Updated on 2025/11/26

写真a

 
NAKAGAWA SHIGERU
 
Organization
Institute of Integrated Research Laboratory for Future Interdisciplinary Research of Science and Technology Professor
Title
Professor
Homepage
https://www.photonics.first.iir.isct.ac.jp/index-e.html
External link

Degree

  • Ph.D. ( 2001.5   University of California, Santa Barbara )

Research Interests

  • Photonic reservoir computing

  • Photonic quantum computer

  • Integrated photonics

  • Reservoir computing

  • Quantum photonics

  • Photonic AI

  • Quantum computer

Education

  • University of California, Santa Barbara   College of Engineering   Electrical and Computer Engineering

    1998.10 - 2001.5

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    Country： United States

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  • Tohoku University   Graduate School of Engineering   Department of Electronic Engineering

    1989.4 - 1991.3

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    Country： Japan

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  • Tohoku University   Faculty of Engineering

    1985.4 - 1989.3

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    Country： Japan

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Research History

  • Institute of Science Tokyo   Institute of Integrated Research   Professor

    2024.10

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    Country：Japan

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  • Tokyo Institute of Technology   Professor

    2022.5 - 2024.9

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    Country：Japan

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  • IBM Research   Senior Technical Staff Member

    2005.7 - 2022.12

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    Country：Japan

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  • Fibest Ltd.

    2003.3 - 2005.6

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    Country：Japan

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  • Agility Communications, Inc.

    2000.10 - 2003.2

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    Country：United States

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  • Hewlett-Packard Laboratories, Japan   Member of Technical Staff

    1991.4 - 1998.9

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    Country：Japan

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Professional Memberships

Papers

  • Scalable and Universal Reservoir Computing with 2D Active Photonic Cavities Reviewed

    Shiki Endo, Wataru Sugahara, Shigeru Nakagawa

    2025.11

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    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1007/978-981-95-4094-5_11

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  • Energy-Efficient 1060-nm Optical Link Operating up to 28 Gb/s Reviewed

    Jean Benoit Heroux, Tomufumi Kise, Masaki Funabashi, Toyohiro Aoki, Clint L. Schow, Alexander V. Rylyakov, Shigeru Nakagawa

    Journal of Lightwave Technology   33 ( 4 )   733 - 740   2015.2

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers (IEEE)  

    DOI： 10.1109/jlt.2015.2393888

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  • Dry-film polymer waveguide for silicon photonics chip packaging Reviewed

    Hsiang-Han Hsu, Shigeru Nakagawa

    Optics Express   22 ( 19 )   23379 - 23379   2014.9

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Optica Publishing Group  

    DOI： 10.1364/oe.22.023379

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  • Feedback tolerance of DFB laser for silicon photonics packaging Reviewed

    Seiji Takeda, Shigeru Nakagawa

    Optics Express   22 ( 7 )   8451 - 8451   2014.4

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Optica Publishing Group  

    DOI： 10.1364/oe.22.008451

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  • High-Bandwidth Density and Low-Power Optical MCM Using Waveguide-Integrated Organic Substrate Reviewed

    Masao Tokunari, Hsiang-Han Hsu, Kazushige Toriyama, Hirokazu Noma, Shigeru Nakagawa

    Journal of Lightwave Technology   32 ( 6 )   1207 - 1212   2014.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers (IEEE)  

    DOI： 10.1109/jlt.2013.2292703

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  • Analysis of Connection Loss for a GI Waveguide Based Optical Link Using the Finite Difference Beam Propagation Method Reviewed

    Hsiang-Han Hsu, T. Ishigure, S. Nakagawa

    Journal of Lightwave Technology   31 ( 12 )   2036 - 2042   2013.6

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers (IEEE)  

    DOI： 10.1109/jlt.2013.2262711

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  • In-situ MBE Si as passivating interlayer on GaAs for HfO2 MOSCAP’s: effect of GaAs surface reconstruction Reviewed

    D.J. Webb, J. Fompeyrine, S. Nakagawa, A. Dimoulas, C. Rossel, M. Sousa, R. Germann, S.F. Alvarado, J.P. Locquet, C. Marchiori, H. Siegwart, A. Callegari, E. Kiewra, Y. Sun, J. De Souza, N. Hoffmann

    Microelectronic Engineering   84 ( 9-10 )   2142 - 2145   2007.9

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.mee.2007.04.056

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  • InP-based all-epitaxial 1.3-μm VCSELs with selectively etched AlInAs apertures and Sb-based DBRs Reviewed

    T. Asano, D. Feezell, R. Koda, M.H.M. Reddy, D.A. Buell, A.S. Huntington, E. Hall, S. Nakagawa, L.A. Coldren

    IEEE Photonics Technology Letters   15 ( 10 )   1333 - 1335   2003.10

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers (IEEE)  

    DOI： 10.1109/lpt.2003.817987

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  • 1.55um, InP-lattice-matched VCSELs with AlGaAsSb/AlAsSb DBRs Reviewed

    Shigeru Nakagawa, Eric Hall, Guilhem Almuneau, Jim K. Kim, David A. Buell, Herbert Kroemer, and Larry A. Coldren

    IEEE Journal of Selected Topics in Quantum Electronics   vol. 7   2001

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  • 88oC, continuous-wave operation of apertured, intracavity contacted, 1.55um vertical-cavity surface-emitting lasers Reviewed

    Shigeru Nakagawa, Eric Hall, Guilhem Almuneau, Jim K. Kim, David A. Buell, Herbert Kroemer, and Larry A. Coldren

    Applied Physics Letters   vol. 78   2001

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  • Selectively etched undercut apertures in AlAsSb-based VCSELs Reviewed

    Eric Hall, Shigeru Nakagawa, Guilhem Almuneau, Jin, K. Kim, Larry A. Coldren

    IEEE Photonics Technology Letters   vol. 13   2001

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  • RF crosstalk in multiple-wavelength vertical-cavity surface-emitting laser arrays Reviewed

    S. Nakagawa, Syn-Yem Hu, D. Louderback, L.A. Coldren

    IEEE Photonics Technology Letters   12 ( 6 )   612 - 614   2000.6

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers (IEEE)  

    DOI： 10.1109/68.849060

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  • Second-Harmonic Generation from GaP/AlP Multilayers on GaP (111) Substrates Based on Quasi-Phase Matching for the Fundamental Standing Wave Reviewed

    Motoyuki Sato Motoyuki Sato, Hiroyuki Yaguchi Hiroyuki Yaguchi, Ichiro Shoji Ichiro Shoji, Kentaro Onabe Kentaro Onabe, Ryoichi Ito Ryoichi Ito, Yasuhiro Shiraki Yasuhiro Shiraki, Shigeru Nakagawa Shigeru Nakagawa, Norihide Yamada Norihide Yamada

    Japanese Journal of Applied Physics   39 ( 4B )   L334 - L334   2000.4

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    We have demonstrated second-harmonic generation (SHG) from GaP/AlP multilayers on GaP(111)A substrates based on quasi-phase matching (QPM) for the fundamental standing wave. Theoretical calculation predicted that the SHG power increases with increasing number of GaP/AlP multilayers because of their small absorption coefficient in the spectral range of second-harmonic light, which is in contrast to the case of GaAs/AlAs QPM multilayers. In the transmission SHG measurement using a frequency-tunable Ti:Sapphire laser as a fundamental wave source, maximum SHG power was obtained at a fundamental wavelength of 990 nm from the five-pair GaP/AlP QPM multilayers. The wavelength conversion efficiency was measured to be 9.8×10-10%/W, which was smaller than the theoretical value of 6.5×10-8%/W.

    DOI： 10.1143/jjap.39.l334

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    Other Link： https://iopscience.iop.org/article/10.1143/JJAP.39.L334/pdf

  • Blue vertical-cavity surface-emitting lasers based on second-harmonic generation grown on (311)B and (411)A GaAs substrates Reviewed

    Yasuhisa Kaneko, Shigeru Nakagawa, Yoshikatsu Ichimura, Norihide Yamada, Dan E. Mars, Tetsuya Takeuchi

    Journal of Applied Physics   87 ( 4 )   1597 - 1603   2000.2

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：AIP Publishing  

    We have studied blue vertical-cavity surface-emitting lasers (VCSELs) based on second-harmonic generation (SHG) grown on (411)A and (311)B GaAs substrates in order to investigate suitable substrate orientations for SHG-VCSELs. The comparison among substrate orientations has been made on three parameters, SHG conversion efficiency, transparency current density and gain coefficient. The transparency current density and the gain coefficient are characterized by edge emitting lasers grown on the above substrates. We also discuss the transparency current density and the gain coefficient for (311)A reported previously by Takahashi et al. [M. Takahashi, M. Hirai, K. Fujita, N. Egami, and K. Iga, J. Appl. Phys. 82, 4551 (1997)]. SHG conversion efficiency is 38 and 30% W for SHG-VCSELs grown on (311)B and (411)A substrates, respectively, which is consistent with theory, assuming identical nonlinear coefficients for the A face and B face. Transparency current density for (311)A, (311)B and (411)A is 80, 105 and 60 A/cm2, and gain coefficients for (311)A, (311)B and (411)A are 20, 13 and 18 cm−1, respectively. There are no significant differences between (311)A and (411)A, while those for (311)B are less than those for (311)A. In conclusion, SHG efficiency is dependent on crystal orientation consistent with theory and thus the (311) orientation is preferable. Optical gain is independent of substrate orientation, while it is dependent on substrate face and A face is preferable.

    DOI： 10.1063/1.372065

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  • Molecular beam epitaxial growth of monolithic 1.55um vertical cavity surface emitting lasers with AlGaAsSb/AlAsSb Bragg mirrors Reviewed

    Guilhem Almuneau, Eric Hall, Shigeru Nakagawa, Jin K. Kim, Dan Lofgreen, John, H. English, a, d Larry A. Coldren

    Journal of vacuum science and technology B   vol. 18   2000

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  • Improved electrical and thermal properties of InP/AlGaAsSb Bragg mirrors for long-wavelength vertical cavity lasers Reviewed

    Guilhem Almuneau, Eric Hall, and, Larry A. Coldren, Toshikazu Mukaihara, Shigeru Nakagawa

    IEEE Photonics Technology Letters   vol. 12   2000

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  • Room temperature CW-operation of lattice-matched long-wavelength VCSELs Reviewed

    Eric Hall, Shigeru Nakagawa, Guilhem Almuneau, Jin, K. Kim, Larry A. Coldren

    Electronics Letters   vol. 36   2000

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  • Near-room temperature CW operation of electrically-pumped multiple-active-region 1.55um VCSELs with high differential efficiency Reviewed

    Jin K. Kim, Shigeru Nakagawa, Eric Hall, and Larry A. Coldren

    Applied Physics Letters   vol. 77   2000

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  • Vertical-Cavity Surface-Emitting Lasers with Stable Polarization Grown on (411)A-Oriented GaAs Substrates Reviewed

    Yasuhisa Kaneko, Dan E. Mars, Shigeru Nakagawa, Yoshikatsu Ichimura, Norihide Yamada

    Japanese Journal of Applied Physics   38 ( 8A )   L864 - L864   1999.8

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    We demonstrate continuous-wave operation at room temperature for vertical-cavity surface-emitting lasers (VCSELs) grown on (411)A-oriented GaAs substrates by molecular beam epitaxy. A threshold current of 0.5 mA is obtained for selectively oxidized VCSELs with a square-shaped emitting aperture of 4×4 µm2. The polarization is well stabilized parallel to the [\overline122] direction that has the highest optical gain.

    DOI： 10.1143/jjap.38.l864

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    Other Link： https://iopscience.iop.org/article/10.1143/JJAP.38.L864/pdf

  • Modulation and free-space link characteristics of monolithically integrated vertical-cavity lasers and photodetectors with microlenses Reviewed

    D.A. Louderback, O. Sjolund, E.R. Hegblom, S. Nakagawa, J. Ko, L.A. Coldren

    IEEE Journal of Selected Topics in Quantum Electronics   5 ( 2 )   157 - 165   1999

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers (IEEE)  

    DOI： 10.1109/2944.778273

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  • Quantum-confined Stark effect in strained GaInN quantum wells on sapphire (0 0 0 1) Reviewed

    Tetsuya Takeuchi, Shigetoshi Sota, Hiromitsu Sakai, Hiroshi Amanoa, Isamu Akasaki, Yawara Kaneko, Shigeru Nakagawa, Yishifumi Yamaoka, Norihide Yamada

    Journal of Crystal Growth   189-190   616 - 620   1998.6

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/s0022-0248(98)00216-4

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  • Determination of piezoelectric fields in strained GaInN quantum wells using the quantum confined Stark effects Reviewed

    Tetsuya Takeuchi, Hiroshi Amano, Isamu Akasaki, Yawara Kaneko, Shigeru Nakagawa, Yoshifumi Yamaoka, Norihide Yamada

    Applied Physics Letters   vol. 73   1998

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  • Growth of vertical cavity surface emitting laser material on (311)B GaAs by MBE Reviewed

    Dan E. Mars, Yasuhisa Kaneko, Shigeru Nakagawa, Tetsuya Takeuchi, Norihide Yamada

    Journal of Crystal Growth   vol. 175-176   1997

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  • Second-Harmonic Generation in Vertical-Cavity Surface-Emitting Laser Reviewed

    Norihide Yamada, Yoshikatsu Ichimura, Shigeru Nakagawa, Yasuhisa Kaneko, Tetsuya Takeuchi Tetsuya Takeuchi, Nobuo Mikoshiba Nobuo Mikoshiba

    Japanese Journal of Applied Physics   35 ( 5R )   2659 - 2659   1996.5

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    A concept for a short-wavelength compact laser is proposed, in which second-harmonic coherent light is produced by converting fundamental light lased in a vertical-cavity surface-emitting laser. A layer is incorporated inside the laser cavity particularly for efficient second-harmonic generation. This layer consists of second-order optical nonlinear crystals which are preferably III–V- or II–VI-system compound semiconductors epitaxially grown with crystal orientation tilted from <100>. Simulation indicates that the device will produce several hundred µ W with AlAs/GaAs alternating layers for second-harmonic generation and an InGaAs active layer for lasing.

    DOI： 10.1143/jjap.35.2659

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    Other Link： https://iopscience.iop.org/article/10.1143/JJAP.35.2659/pdf

  • Contiuous-wave operation of a blue vertical-cavity surface-emitting laser based on second-harmonic generation Reviewed

    Norihide Yamada, Yasuhisa Kaneko, Shigeru Nakagawa, Dan E. Mars, Tetsuya Takeuchi, Nobuo Mikoshiba

    Applied Physics Letters   vol. 68   1996

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  • Generating short-wavelength light using a vertical-cavity laser structure

    Shigeru Nakagawa, Danny E. Mars, Norihide Yamada

    HEWLETT PACKARD JOURNAL   46   72 - 75   1995.2

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  • InGaAs/GaAs vertical-cavity surface-emitting lasers on (311)B GaAs substrate Reviewed

    Yasuhisa Kaneko, Shigeru Nakagawa, Tetsuya Takeuchi, Dan E. Mars, Norihide Yamada, Nobuo Mikoshiba

    Electronics Letters   vol. 31   1995

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  • Second-harmonic generation from GaAs/AlAs vertical cavity Reviewed

    Shigeru Nakagawa, Norihide Yamada, Nobuo Mikoshiba, Dan E. Mars

    Applied Physics Letters   vol. 66   1995

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  • Micropump and sample-injector for integrated chemical analyzing systems Reviewed

    Shuichi Shoji, Shigeru Nakagawa, Masayoshi Esashi

    Sensors and Actuators A: Physical   vol. 21   1990

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Presentations

  • Simulation Study of Physical Reservoir Computing by Nonlinear Deterministic Time Series Analysis.

    Toshiyuki Yamane, Seiji Takeda, Daiju Nakano, Gouhei Tanaka, Ryosho Nakane, Akira Hirose 0001, Shigeru Nakagawa

    Neural Information Processing - 24th International Conference  2017  Springer

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    Event date： 2017

    Language：English   Presentation type：Oral presentation (general)  

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    Other Link： https://dblp.uni-trier.de/db/conf/iconip/iconip2017-1.html#YamaneTNTNHN17

  • Waveform Classification by Memristive Reservoir Computing.

    Gouhei Tanaka, Ryosho Nakane, Toshiyuki Yamane, Seiji Takeda, Daiju Nakano, Shigeru Nakagawa, Akira Hirose 0001

    Neural Information Processing - 24th International Conference  2017  Springer

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    Event date： 2017

    Language：English   Presentation type：Oral presentation (general)  

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    Other Link： https://dblp.uni-trier.de/db/conf/iconip/iconip2017-4.html#TanakaNYTNNH17

  • Complex-Valued Neural Networks for Wave-Based Realization of Reservoir Computing.

    Akira Hirose 0001, Seiji Takeda, Toshiyuki Yamane, Daiju Nakano, Shigeru Nakagawa, Ryosho Nakane, Gouhei Tanaka

    Neural Information Processing - 24th International Conference  2017  Springer

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    Event date： 2017

    Language：English   Presentation type：Oral presentation (general)  

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    Other Link： https://dblp.uni-trier.de/db/conf/iconip/iconip2017-4.html#HiroseTYNNNT17

  • Photonic Reservoir Computing Based on Laser Dynamics with External Feedback.

    Seiji Takeda, Daiju Nakano, Toshiyuki Yamane, Gouhei Tanaka, Ryosho Nakane, Akira Hirose 0001, Shigeru Nakagawa

    Neural Information Processing - 23rd International Conference  2016 

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    Event date： 2016

    Language：English   Presentation type：Oral presentation (general)  

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    Other Link： https://dblp.uni-trier.de/db/conf/iconip/iconip2016-1.html#TakedaNYTNHN16

  • Dynamics of Reservoir Computing at the Edge of Stability.

    Toshiyuki Yamane, Seiji Takeda, Daiju Nakano, Gouhei Tanaka, Ryosho Nakane, Shigeru Nakagawa, Akira Hirose 0001

    Neural Information Processing - 23rd International Conference  2016 

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    Event date： 2016

    Language：English   Presentation type：Oral presentation (general)  

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    Other Link： https://dblp.uni-trier.de/db/conf/iconip/iconip2016-1.html#YamaneTNTNNH16

  • Exploiting Heterogeneous Units for Reservoir Computing with Simple Architecture.

    Gouhei Tanaka, Ryosho Nakane, Toshiyuki Yamane, Daiju Nakano, Seiji Takeda, Shigeru Nakagawa, Akira Hirose 0001

    Neural Information Processing - 23rd International Conference  2016 

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    Event date： 2016

    Language：English   Presentation type：Oral presentation (general)  

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    Other Link： https://dblp.uni-trier.de/db/conf/iconip/iconip2016-1.html#TanakaNYNTNH16

  • High-bandwidth optical I/O link with optical MCM.

    Hsiang-Han Hsu, Masao Tokunari, Shigeru Nakagawa

    Optical Fiber Communications Conference and Exhibition(OFC)  2015  IEEE

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    Event date： 2015

    Language：English   Presentation type：Oral presentation (general)  

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    Other Link： https://dblp.uni-trier.de/rec/conf/ofc/2015

  • Low power CMOS-driven 1060 nm multimode optical link

    Jean Benoit Héroux, Tomofumi Kise, Masaki Funabashi, Toyohiro Aoki, Clint Schow, Alexander V. Rylyakov, Shigeru Nakagawa

    Optical Fiber Communication Conference  2014  OSA

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    Event date： 2014

    Language：English  

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  • Low power CMOS-driven 1060 nm multimode optical link.

    Jean Benoit Héroux, Tomofumi Kise, Masaki Funabashi, Toyohiro Aoki, Clint Schow, Alexander V. Rylyakov, Shigeru Nakagawa

    Optical Fiber Communications Conference and Exhibition(OFC)  2014  IEEE

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  • CI-2-5 Optical Interconnect for Servers and HPC Invited

    Nakagawa Shigeru

    Proceedings of the Society Conference of IEICE  2012.8  The Institute of Electronics, Information and Communication Engineers

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    Event date： 2012.8

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • C-3-69 High-Density Optical Multi-Chip Module Invited

    Nakagawa Shigeru

    Proceedings of the Society Conference of IEICE  2012.8  The Institute of Electronics, Information and Communication Engineers

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    Event date： 2012.8

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • Link power budget advantage in GI-core polymer optical waveguide link for optical printed circuit boards

    Sho Yakabe, Takaaki Ishigure, Shigeru Nakagawa

    SPIE Proceedings  2012.2  SPIE

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    Event date： 2012.2

    Language：English  

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  • Characterization and analysis of graded index optical waveguides for the realization of low-power, high-density, and high-speed optical link

    Hsiang-Han Hsu, Takaaki Ishigure, Shigeru Nakagawa

    SPIE Proceedings  2012.2  SPIE

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    Event date： 2012.2

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  • Link Power Budget Advantage of GI-core Polymer Optical Waveguide for Waveguide-based Optical Link

    Sho Yakabe, Takaaki Ishigure, Shigeru Nakagawa

    Optical Fiber Communication Conference  2012  OSA

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    Event date： 2012

    Language：English  

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  • 「第8回光・電子集積技術業績賞（林厳雄賞）受賞記念講演」高性能コンピューターを実現する光インターコネクト技術 Invited

    中川 茂

    応用物理学会学術講演会講演予稿集  2011.8  公益社団法人 応用物理学会

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    Event date： 2011.8

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • 持続可能な世界を支える光インターコネクト技術—特集 第120回記念微小光学研究会 「微小光学30年とこれからの30年」より Invited

    中川 茂

    O plus E : Optics + electronics  2011.8  東京 : アドコム・メディア

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    Event date： 2011.8

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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    Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I11191874

  • 「第8回光・電子集積技術業績集（林厳雄賞）受賞記念講演」高性能コンピューターを実現する光インターコネクト技術 Invited

    中川 茂

    応用物理学会学術講演会講演予稿集  2011.3  公益社団法人 応用物理学会

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    Event date： 2011.3

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • 20 Gbps optical link with high-efficiency 1060 nm VCSEL

    Jean Benoit Héroux, Keishi Takaki, Masao Tokunari, Shigeru Nakagawa

    SPIE Proceedings  2011.2  SPIE

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    Event date： 2011.2

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  • 光インタコネクト技術—Optical interconnect technology Invited

    中川 茂

    電子情報通信学会誌 = The journal of the Institute of Electronics, Information and Communication Engineers  2010.12  東京 : 電子情報通信学会

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    Event date： 2010.12

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    資料形態 : テキストデータ プレーンテキスト
    コレクション : 国立国会図書館デジタルコレクション > デジタル化資料 > 雑誌

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    Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I10929434

  • サーバーの低消費電力化に向けた光インターコネクト—Optical interconnects for low-power servers—特集 ネットワークの省エネ化を実現する光技術 Invited

    中川 茂

    Optronics : 光技術コーディネートジャーナル  2010.1  東京 : オプトロニクス社

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    Event date： 2010.1

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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    Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I10518581

  • Low power optical interconnect at 10 Gbps with high efficiency 1060nm VCSEL

    Jean Benoit Héroux, Masao Tokunari, Keishi Takaki, Shigeru Nakagawa

    Conference on Lasers and Electro-Optics 2010  2010  OSA

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    Event date： 2010

    Language：English  

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  • High-bandwidth, chip-based optical interconnects on waveguide-integrated SLC for optical off-chip I/O

    Shigeru Nakagawa, Yoichi Taira, Hidetoshi Numata, Kaoru Kobayashi, Kenji Terada, Masahiro Fukui

    2009 59th Electronic Components and Technology Conference  2009.5  IEEE

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    Event date： 2009.5

    Language：English  

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  • CS-6-2 Low Power Computing Systems with Optical Interconnects Invited

    Nakagawa Shigeru

    Proceedings of the Society Conference of IEICE  2008.9  The Institute of Electronics, Information and Communication Engineers

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    Event date： 2008.9

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • C-4-9 Low Power Optical Interconnect Transmitter Exploiting VCSEL and CMOS Driver Invited

    Nakagawa Shigeru

    Proceedings of the Society Conference of IEICE  2008.9  The Institute of Electronics, Information and Communication Engineers

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    Event date： 2008.9

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • High-density optical interconnect exploiting build-up waveguide-on-SLC board

    Shigeru Nakagawa, Yoichi Taira, Hidetoshi Numata, Kaoru Kobayashi, Kenji Terada, Yutaka Tsukada

    2008 58th Electronic Components and Technology Conference  2008.5  IEEE

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    Event date： 2008.5

    Language：English  

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  • 1.5mW/Gbps Low Power Optical Interconnect Transmitter Exploiting High-Efficiency VCSEL and CMOS Driver

    Shigeru Nakagawa, Daniel Kuchta, Clint Schow, Richard John, Larry A. Coldren, Yu-Chia Chang

    OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference  2008.2  IEEE

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    Event date： 2008.2

    Language：English  

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  • コンピュータへの光インターコネクションの適用 Invited

    中川茂

    2007年エレクトロニクス実装学界最先端実装技術シンポジウム予稿集 (5月31日)  2007 

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    Event date： 2007

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • Optical Interconnect for Computing Systems Invited

    Nakagawa Shigeru

    Proceedings of JIEP Annual Meeting  2007  The Japan Institute of Electronics Packaging

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    Event date： 2007

    Presentation type：Oral presentation (invited, special)  

    Computing systems including all types of servers are required to achieve higher performance with lower power consumption. Optical solutions are getting more important for interconnects at various levels of computing systems. In this talk, requirements for interconnects in computing systems and benefits provided by optical interconnects will be discussed.

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  • Compact 10Gbps InP-Based Waveguide Modulator Invited

    S. Nakagawa, H. Soda

    2005 Pacific Rim Conference on Lasers & Electro-Optics  2005.7  IEEE

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    Event date： 2005.7

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Phase noise of widely-tunable SG-DBR laser

    S. Nakagawa, G. Fish, A. Dahl, P. Koh, C. Schow, M. Mack, L. Wang, R. Yu

    OFC 2003 Optical Fiber Communications Conference, 2003.  2003  IEEE

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    Event date： 2003

    Language：English   Presentation type：Oral presentation (general)  

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  • Widely tunable electroabsorption-modulated sampled-grating DBR laser transmitter

    Y.A. Akulova, G.A. Fish, Ping-Chiek Koh, C.L. Schow, P. Kozodoy, A.P. Dahl, S. Nakagawa, M.C. Larson, M.P. Mack, T.A. Strand, C.W. Coldren, E. Hegblom, S.K. Penniman, T. Wipiejewski, L.A. Coldren

    IEEE Journal of Selected Topics in Quantum Electronics  2002.11  Institute of Electrical and Electronics Engineers (IEEE)

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    Event date： 2002.11

    Language：English   Presentation type：Oral presentation (general)  

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  • Current status of epitaxial 1.31-1.55 μm VCSELs on InP

    M.H.M. Reddy, D.A. Buell, A.S. Huntington, R. Koda, D. Freezell, T. Asano, J.K. Jim, E. Hall, S. Nakagawa, L.A. Coldren

    IEEE/LEOS Summer Topi All-Optical Networking: Existing and Emerging Architecture and Applications/Dynamic Enablers of Next-Generation Optical Communications Systems/Fast Optical Processing in Optical Transmission/VCSEL and Microcavity Lasers.  2002.7  IEEE

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    Event date： 2002.7

    Language：English  

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  • Widely-tunable electroabsorption-modulated sampled grating DBR laser integrated with semiconductor optical amplifier

    Y.A. Akulova, C. Schow, A. Karim, S. Nakagawa, P. Kozodoy, G.A. Fish, J. DeFranco, A. Dahl, M. Larson, T. Wipiejewski, D. Pavinski, T. Butrie, L.A. Coldren

    Optical Fiber Communication Conference and Exhibit  2002.3  Opt Soc. America

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    Event date： 2002.3

    Language：English  

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  • InP-based 1310-1550 nm lattice-matched VCSELs

    D.A. Buell, A.S. Huntington, R. Koda, E. Hall, S. Nakagawa, M. Reddy, L.A. Coldren

    LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)  2001.11  IEEE

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    Event date： 2001.11

    Language：English  

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  • Advances in long-wavelength single-mode VCSELs and packaging approaches for single-mode fiber applications Invited

    L.A. Coldren, E. Hall, S. Nakagawa

    2001 Proceedings. 51st Electronic Components and Technology Conference (Cat. No.01CH37220)  2001.5  IEEE

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    Event date： 2001.5

    Language：English  

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  • Bipolar cascade 1.55 μm VCSELs with >1 differential quantum efficiency and CW operation

    J.K. Kim, E. Hall, S. Nakagawa, A. Huntington, L.A. Coldren

    Conference Digest. 2000 IEEE 17th International Semiconductor Laser Conference. (Cat. No.00CH37092)  2000.9  IEEE

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    Event date： 2000.9

    Language：English  

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  • Long-wavelength VCSELs with AlGaAsSb/AlAsSb Bragg mirrors lattice-matched on InP substrates</title>

    Guilhem Almuneau, Eric M. Hall, Shigeru Nakagawa, Jin K. Kim, Larry A. Coldren

    SPIE Proceedings  2000.5  SPIE

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    Event date： 2000.5

    Language：English  

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  • Flip-chip bonded, back-emitting, microlensed arrays of monolithic vertical cavity lasers and resonant photodetectors Invited

    L.A. Coldren, O. Sjolund, D.A. Louderback, S. Nakagawa, E.R. Hegblom

    1999 Proceedings. 49th Electronic Components and Technology Conference (Cat. No.99CH36299)  1999.6  IEEE

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    Event date： 1999.6

    Language：English  

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  • Vertical Cavity Lasers with Large Bandwidths at Low Currents for Dense Free-Space Optical Interconnects

    D. A. Louderback, O. Sjölund, E. R. Hegblom, S. Nakagawa, J. Ko, L. A. Coldren

    Optics in Computing  1999  OSA

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    Event date： 1999

    Language：English  

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  • Free-Space Optical Interconnect Using Flip-Chip Bonded, Microlensed Arrays of Monolithic Vertical Cavity Lasers and Resonant Photodetectors

    O. Sjölund, D. A. Louderback, E. R. Hegblom, S. Nakagawa, J. Ko, L. A. Coldren

    Optics in Computing  1999  OSA

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    Event date： 1999

    Language：English  

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  • Progress on long wavelength VCSEL Invited

    S. Nakagawa, E. Hall, L.A. Coldren

    IEEE LEOS Summer Topical Meetings  2001.7 

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    Presentation type：Oral presentation (invited, special)  

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  • Long-wavelength VCSELs with AlGaAsSb DBRs Invited

    Shigeru Nakagawa, Eric M. Hall, Larry A. Coldren

    International Symposium on the Convergence of IT and Communications  2001.11 

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    Language：English   Presentation type：Oral presentation (invited, special)  

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  • 1.55-um, InP-lattice-matched VCSELs operating at RT under CW

    S. Nakagawa, E.M. Hall, G Almuneau, J.K. Kim, H. Kroemer, L.A. Coldren

    IEEE 17th International Semiconductor Laser Conference  2000.9 

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    Language：English   Presentation type：Oral presentation (general)  

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  • Integrated fluid control systems on a silicon wafer

    Shigeru Nakagawa, Shuichi Shoji, Masayoshi Esashi

    1st International Conference on Micro Electro, Opto, Mechanic Systems and Components  1990.9 

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    Language：English   Presentation type：Oral presentation (general)  

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  • A micro chemical analyzing system integrated on a silicon wafer

    Shigeru Nakagawa, Shuichi Shoji, Masayoshi Esashi

    IEEE Micro Electro Mechanical Systems  1990.2 

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    Language：English   Presentation type：Oral presentation (general)  

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  • 1.55um, double-intracavity contacted, InP-lattice-matched VCSELs

    S. Nakagawa, E. Hall, G. Almuneau, J.K. Kim, D.A. Buell, H. Kroemer, L.A. Coldren

    IEEE 13th Lasers and Electro-Optics Society Annual Meeting  2000.11 

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    Language：English   Presentation type：Oral presentation (general)  

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  • Recent developments in long-wavelength VCSELs Invited

    S. Nakagawa, E. Hall, L. A. Coldren

    Integrated Photonics Research 2001  2001.6 

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    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Optical interconnects for high-performance computing and data centers Invited

    Shigeru Nakagawa

    2011 Asia Communications and Photonics Conference  2011.11 

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    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Systems and subsystems requirements Invited

    Shigeru Nakagawa

    International Semiconductor Laser Conference 2010  2010.9 

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    Language：English   Presentation type：Oral presentation (invited, special)  

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  • High-density, low-power optical interconnects for computing systems Invited

    Shigeru Nakagawa

    IEEE Photonics Society Summer Topicals 2010  2010.7 

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    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Chip-level optical I/O for FPGA on optical substrate Invited

    Shigeru Nakagawa

    Photonics West 2010  2010.1 

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    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Low-power, high-bandwidth optical interconnects for computing systems Invited

    Shigeru Nakagawa

    2009 Asia Communications and Photonics Conference and Exhibition  2009.11 

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    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Photonics for supercomputers Invited

    Shigeru Nakagawa

    2012 OITDA Symposium  2012.2 

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    Language：Japanese   Presentation type：Symposium, workshop panel (nominated)  

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  • Complex-valued neural networks to realize energy-efficient neural networks including reservoir computing

    Akira Hirose, Seiji Takeda, Toshiyuki Yamane, Daiju Nakano, Shigeru Nakagawa, Ryosho Nakane, Gouhei Tanaka

    International Symposium on Nonlinear Theory and Its Applications  2017.12 

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    Language：English   Presentation type：Oral presentation (general)  

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  • Photonics for future computing Invited

    Shigeru Nakagawa

    IEICE  2023.3 

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    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • Photonics for New Era of Computing Invited

    Shigeru Nakagawa

    Science Council of Japan, Advanced Photonics Symposium  2013.4 

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    Language：Japanese   Presentation type：Symposium, workshop panel (nominated)  

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  • Optical interconnect for current and future computers Invited

    Shigeru Nakagawa

    CLEO-Pacific Rim 2013  2013.6 

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    Language：English   Presentation type：Oral presentation (invited, special)  

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  • High-density optical multi-chip module on waveguide-integrated carrier Invited

    Shigeru Nakagawa

    OptoElectroincs and Communications Conference and Photonics in Switching  2013.6 

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    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Nonlinear dynamics of memristive networks and its application to reservoir computing

    Gouhei Tanaka, Ryosho Nakane, Toshiyuki Yamane, Seiji Takeda, Daiju Nakano, Shigeru Nakagawa, Akira Hirose

    International Symposium on Nonlinear Theory and Its Applications  2017.12 

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  • バレートポロジーに基づく円偏光生成器の検討

    林 文博, 張 成昆, 吉見 拓展, 甲斐 航, 雨宮 智宏, 太田 泰友, 岩本 敏, 中川 茂

    第85回応用物理学会秋季学術講演会  2024.9 

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    Language：Japanese   Presentation type：Oral presentation (general)  

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  • SiCバナジウム中心に基づく通信波長帯量子光源に向けたナノビーム光共振器の設計

    林 文博, 中川 茂, 西山 伸彦

    第86回応用物理学会秋季学術講演会  2025.9 

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    Language：Japanese   Presentation type：Oral presentation (general)  

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  • On-chip circular polarization generators using valley photonic crystals

    Wataru Kai, Wenbo Lin, Chengkun Zhang, Hironobu Yoshimi, Tomohiro Amemiya, Yasumoto Ota, Satoshi Iwamoto, Shigeru Nakagawa

    Conference on Lasers and Electro-Optics  2025.5 

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    Language：English   Presentation type：Poster presentation  

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  • Intracavity-contact, quantum-dot vertical microcavities with resonant tunneling injection for electrically-driven indistinguishable single-photon sources

    Tomohiro Kitamura, Ryohei Yamaguchi, Tomoya Taguchi, Wenbo Lin, Satoshi Iwamoto, Yasuhiko Arakawa, Shigeru Nakagawa

    Conference on Lasers and Electro-Optics  2025.5 

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    Language：English   Presentation type：Poster presentation  

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  • バレートポロジーを活用した円偏光生成器の作製と評価

    甲斐 航, 林 文博, 張 成昆, 吉見 拓展, 雨宮 智宏, 太田 泰友, 岩本 敏, 中川茂

    第72回応用物理学会春季学術講演会  2025.3 

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    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 垂直微小共振器量子ドット単一光子源のための共鳴トンネル注入の研究

    喜多村 友大, 山口 凌平, 田口 朋弥, 林 博文, 岩本 敏, 荒川 泰彦, 中川 茂

    第72回応用物理学会春季学術講演会  2025.3 

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    Language：Japanese   Presentation type：Oral presentation (general)  

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Industrial property rights

  • 光デバイス

    中川茂, 雨宮智宏

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    Applicant：国立大学法人東京工業大学

    Application no：特願2023030261  Date applied：2023.5

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  • 単一光子源装置

    中川茂

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    Applicant：国立大学法人東京工業大学

    Application no：特願2023074485  Date applied：2023.4

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  • Neural network for chemical compounds

    Satoshi Hara, Gakuto Kurata, Shigeru Nakagawa, Seiji Takeda

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    Applicant：International Business Machines Corporation

    Application no：US17132631  Date applied：2020.12

    Patent/Registration no：US11934938B2  Date registered：2024.3 

    Rights holder：International Business Machines Corporation

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  • Neural network for chemical compounds

    Satoshi Hara, Gakuto Kurata, Shigeru Nakagawa, Seiji Takeda

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    Applicant：International Business Machines Corporation

    Application no：US15202211  Date applied：2016.7

    Patent/Registration no：US10915808B2  Date registered：2021.2 

    Rights holder：International Business Machines Corporation

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  • Schemes of new materials

    Hsiang H. Hsu, Gakuto Kurata, Koji Masuda, Shigeru Nakagawa, Hajime Nakamura, Seiji Takeda

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    Applicant：International Business Machines Corporation

    Application no：US14984989  Date applied：2015.12

    Patent/Registration no：US10366779B2  Date registered：2019.7 

    Rights holder：International Business Machines Corporation

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  • Method of aperturing vertical-cavity surface-emitting lasers (VCSELs)

    Larry A. Coldren, Eric M. Hall, Shigeru Nakagawa, Guilhem Almuneau

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    Applicant：The Regents of the University of California

    Application no：US09935352  Date applied：2001.8

    Patent/Registration no：US6841407B2  Date registered：2005.1 

    Rights holder：The Regents of The University of California

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  • Double intracavity contacted long-wavelength VCSELs and method of fabricating same

    Eric M. Hall, Shigeru Nakagawa, Larry A. Coldren

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    Applicant：The Regents of The University of California

    Application no：US09935009  Date applied：2001.8

    Patent/Registration no：US6653158B2  Date registered：2003.11 

    Rights holder：The Regents of The University of California

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  • Double intracavity contacted long-wavelength VCSELs

    Larry A. Coldren, Eric M. Hall, Shigeru Nakagawa

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    Applicant：The Regents of The University of California

    Application no：US09935122  Date applied：2001.8

    Patent/Registration no：US6687281B2  Date registered：2004.2 

    Rights holder：The Regents of The University of California

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  • Contact scheme for intracavity-contacted vertical-cavity surface-emitting laser

    Larry A. Coldren, Eric M. Hall, Shigeru Nakagawa

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    Applicant：The Regents of The University of California

    Application no：US09934781  Date applied：2001.8

    Patent/Registration no：US6714573B2  Date registered：2004.3 

    Rights holder：The Regents of The University of California

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  • Heat spreading layers for vertical cavity surface emitting lasers

    Larry A. Coldren, Eric M. Hall, Shigeru Nakagawa

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    Applicant：The Regents of The University of California

    Application no：US09934791  Date applied：2001.8

    Patent/Registration no：US6810064B1  Date registered：2004.10 

    Rights holder：The Regents of The University of Calinfornia

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  • Wavelength monitor using hybric approach

    Douglas M. Baney, Norihide Yamada, Satoshi Watanabe, Shigeru Nakagawa, Yoshikatsu Ichimura

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    Applicant：Agilent Technologies Inc.

    Application no：US09326338  Date applied：1999.6

    Patent/Registration no：US6486984B1  Date registered：2002.11 

    Rights holder：Agilent Technologies Inc.

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  • Multilayer film structure and vertical cavity surface emitting lasers

    Shigeru Nakagawa

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    Applicant：Hewlett Packard Co.

    Application no：US09637955  Date applied：1996.4

    Patent/Registration no：US5729567A  Date registered：1998.3 

    Rights holder：Hewlett Packard Co.

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  • 単一光子源装置およびその製造方法

    中川 茂, 林 文博, 喜多村 友大

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    Applicant：国立大学法人東京科学大学

    Application no：特願2025112133  Date applied：2025.7

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  • 光デバイスおよびその製造方法

    中川 茂

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    Applicant：国立大学法人東京科学大学

    Application no：特願2025018659  Date applied：2025.2

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  • Optical device

    Shigeru Nakagawa, Tomohiro Amemiya

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    Applicant：Tokyo Institute of Technology

    Application no：PCT/JP2024007259  Date applied：2024.2

    Announcement no：WO2024181492A1  Date announced：2024.9

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  • Single photon source device

    Shigeru Nakagawa

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    Applicant：Institute of Science Tokyo

    Application no：PCT/JP2024016526  Date applied：2024.2

    Announcement no：WO2024225458  Date announced：2024.10

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  • Optical module and method of manufacturing optical module

    Shigeru Nakagawa, Yoichi Taira, Masao Tokunari

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    Applicant：International Business Machines Corporation

    Application no：US15470978  Date applied：2017.3

    Patent/Registration no：US9952392B2  Date registered：2018.4 

    Rights holder：International Business Machines Corporation

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  • Optical modules for wavelength multiplexing

    Shigeru Nakagawa, Yoichi Taira, Masao Tokunari

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    Applicant：International Business Machines Corporation

    Application no：US15146989  Date applied：2016.5

    Patent/Registration no：US9927576B2  Date registered：2018.3 

    Rights holder：International Business Machines Corporation

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  • Optical module and method for manufacturing optical module

    Shigeru Nakagawa, Yoichi Taira, Masao Tokunari

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    Applicant：International Business Machines Corporation

    Application no：US150664072  Date applied：2016.3

    Patent/Registration no：US9720190B2  Date registered：2017.8 

    Rights holder：International Business Machines Corporation

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  • Connector for multilayered optical waveguide

    Shigeru Nakagawa, Hidetoshi Numata

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    Applicant：International Business Machines Corporation

    Application no：US15004510  Date applied：2016.1

    Patent/Registration no：US10025040B2  Date registered：2018.7 

    Rights holder：International Business Machines Corporation

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  • Optical device and manufacturing method thereof

    Shigeru Nakagawa, Seiji Takeda

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    Applicant：International Business Machines Corporation

    Application no：US14748321  Date applied：2015.6

    Patent/Registration no：US9304255B2  Date registered：2016.4 

    Rights holder：International Business Machines Corporation

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  • Optical connecting method

    Shigeru Nakagawa, Hidetoshi Numata, Yoichi Taira

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    Applicant：International Business Machines Corporation

    Application no：US14748306  Date applied：2015.6

    Patent/Registration no：US9977191B2  Date registered：2018.5 

    Rights holder：International Business Machines Corporation

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  • Efficient optical (light) coupling

    Hsiang Han Hsu, Shigeru Nakagawa

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    Applicant：International Business Machines Corporation

    Application no：US14748276  Date applied：2015.6

    Patent/Registration no：US9484482B2  Date registered：2016.11 

    Rights holder：International Business Machines Corporation

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  • Optical device, optical connector assembly, and optical connecting method

    Shigeru Nakagawa, Hidetoshi Numata, Yoichi Taira

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    Applicant：International Business Machines Corporation

    Application no：US14657232  Date applied：2015.3

    Patent/Registration no：US9429711B2  Date registered：2016.8 

    Rights holder：International Business Machines Corporation

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  • Optical device and manufacturing method thereof

    Shigeru Nakagawa, Seiji Takeda

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    Applicant：International Business Machines Corporation

    Application no：US14642894  Date applied：2015.3

    Patent/Registration no：US9523816B2  Date registered：2016.12 

    Rights holder：International Business Machines Corporation

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  • Optical modules for wavelength multiplexing

    Shigeru Nakagawa, Yoichi Taira, Masao Tokunari

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    Application no：US14519494  Date applied：2014.10

    Patent/Registration no：US9389366B2  Date registered：2016.7 

    Rights holder：International Business Machines Corporation

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  • Optical module and method for manufacturing optical module

    Shigeru Nakagawa, Yoichi Taira, Masao Tokunari

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    Applicant：International Business Machines Corporation

    Application no：US14483596  Date applied：2014.9

    Patent/Registration no：US9341797B2  Date registered：2016.5 

    Rights holder：International Business Machines Corporation

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  • Connector for multilayered optical waveguide

    Shigeru Nakagawa, Hidetoshi Numata

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    Applicant：International Business Macchines Corporation

    Application no：US14050816  Date applied：2013.10

    Patent/Registration no：US9274288B2  Date registered：2016.3 

    Rights holder：International Business Machines Corporation

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  • Method of manufacturing optical coupling element, optical transmission substrate, optical coupling component, coupling method, and optical interconnect system

    Shigeru Nakagawa, Hidetoshi Numata, Kuniaki Sueoka, Yoichi Taira

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    Applicant：International Business Machines Corporation

    Application no：US13533551  Date applied：2012.6

    Patent/Registration no：US8442362B2  Date registered：2013.5 

    Rights holder：International Business Machines Corporation

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  • Method of manufacturing optical coupling element, optical transmission substrate, optical coupling component, coupling method, and optical interconnect system

    Shigeru Nakagawa, Hidetoshi Numata, Kuniaki Sueoka, Yoichi Taira

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    Applicant：International Business Machines Corporation

    Application no：US12770252  Date applied：2010.4

    Patent/Registration no：US8542963B2  Date registered：2013.9 

    Rights holder：International Business Machines Corporation

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  • Surface emitting laser and manufacturing method thereof

    Shigeru Nakagawa

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    Applicant：International Business Machines Corporation

    Application no：US12544243  Date applied：2009.8

    Patent/Registration no：US7923275B2  Date registered：2011.4 

    Rights holder：International Business Machines Corporation

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  • VCSEL for high speed lower power optical link

    Shigeru Nakagawa

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    Applicant：International Business Machines Corporation

    Application no：US12032854  Date applied：2008.2

    Patent/Registration no：US7501294B1  Date registered：2009.3 

    Rights holder：International Business Machines Corporation

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  • III-nitride semiconductor light emitting device having a silver p-contact

    You Kondoh, Satoshi Watanabe, Yawara Kaneko, Shigeru Nakagawa, Norihide Yamada

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    Applicant：Philips Lumileds Lighting Co LLC

    Application no：US11104310  Date applied：2005.4

    Patent/Registration no：US7252436B2  Date registered：2007.8 

    Rights holder：Philips Lumileds Lighting Co LLC

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  • Optical module and optical communication system

    Shigeru Nakagawa, Haruhisa Soda

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    Applicant：Fibest Ltd.

    Application no：US10713777  Date applied：2003.11

    Patent/Registration no：US7911686B2  Date registered：2011.3 

    Rights holder：Fibest Ltd.

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  • Optical switch and optical commnication system

    Haruhisa Soda, Shigeru Nakagawa

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    Applicant：Fibest Ltd.

    Application no：US10655769  Date applied：2003.9

    Patent/Registration no：US6973238B2  Date registered：2005.12 

    Rights holder：Fibest Ltd.

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  • Semiconductor light emitting device having a silver p-contact

    You Kondoh, Satoshi Watanabe, Yawara Kaneko, Shigeru Nakagawa, Norihide Yamada

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    Applicant：Lumileds LLC

    Application no：US09764024  Date applied：2001.1

    Patent/Registration no：US6900472B2  Date registered：2005.5 

    Rights holder：Lumileds LLC

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  • Nitride semiconductor light emitting device having a silver p-contact

    You Kondoh, Satoshi Watanabe, Yawara Kaneko, Shigeru Nakagawa, Norihide Yamada

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    Applicant：Agilent Technologies Inc.

    Application no：US09212150  Date applied：1998.12

    Patent/Registration no：US6194743B1  Date registered：2001.2 

    Rights holder：Agilent Technologies Inc.

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  • p-contact for a group III-nitride semiconductor device and method of making same

    Norihide Yamada, Shigeru Nakagawa, Yoshifumi Yamaoka, Tetsuya Takeuchi, Yawara Kaneko

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    Applicant：Agilent Technologies Inc.

    Application no：US09021053  Date applied：1998.2

    Patent/Registration no：US6239490B1  Date registered：2001.5 

    Rights holder：Agilent Technologies Inc.

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Awards

  • The Hayashi Prize

    2011.3  

    Shigeru Nakagawa

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