Research Career 【 display / non-display 】

Research Career 【 display / non-display 】

• Slow light and applicatoins to LiDAR, etc.

  Project Year：  -   

• Nanolasers and biosensing applications

  Grants and Funding  

  Project Year：  -   

• Silicon photonics and high-speed optical modulators

  Project Year：  -   

Books 【 display / non-display 】

Books 【 display / non-display 】

• Handbook of Silicon Photonics

  L. Vivien, L. Pavesi and T. Baba (Part： Joint Work )

  CRC Press  2013.03

• Progress of photonic crystal slab devices

  (Part： Joint Work )

  Photon. Electromag. Crystal Structures, Monterey  2007.04

• Encyclopedic Handbook of Integra rated Optics (Eds. K. Iga and Y. Kokubun)

  (Part： Joint Work )

  Marcel Dekker  2005.09

• レーザーハンドブック

  (Part： Joint Work )

  オーム社  2005.04

• Applications of photonic crystals: general devices

  (Part： )

  Springer Verlag  2004.06

  　View Summary

  Eds. K. Inoue and K. Ohtaka

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Thesis for a degree 【 display / non-display 】

Thesis for a degree 【 display / non-display 】

• Antiresonant reflecting optical waveguide and its application to integrated photonics

  馬場　俊彦 

    1990.03

  Doctoral Thesis   Single Work

  　View Summary

  横浜国立大学 本論文はARROWに加え，これと対になるARROW-Bを提案し，これらARROW型導波路の種々の特性を解析的，数値的に解明し，設計手法を確立した。また作製法の最適化，低損失化，摂動解析による作製許容誤差の解明，偏波無依存化を実現した。これらの研究を通して明らかになったこの導波路の特徴を利用して，光検出器との集積化，波長フィルタとの集積化を実証した。

Papers 【 display / non-display 】

Papers 【 display / non-display 】

• Development of a 64 Gbps Si Photonic Crystal Modulator

  Hinakura Yosuke, Arai Hiroyuki, Baba Toshihiko

  IEICE Transactions on Electronics ( 一般社団法人 電子情報通信学会 )    2020.06  [Refereed]

  Joint Work

  　View Summary

  <p>A compact silicon photonic crystal waveguide (PCW) slow-light modulator is presented. The proposed modulator is capable of achieving a 64 Gbps bit-rate in a wide operating spectrum. The slow- light enhances the modulation efficiency in proportion to its group index <i>n</i>_g. Two types of 200-μm-long PCW modulators are presented. These are low- and high-dispersion devices, which are implemented using a complementary metal-oxide-insulator process. The lattice-shifted PCW achieved low-dispersion slow-light and exhibited <i>n</i>_g ≈ 20 with an operating spectrum Δλ ≈ 20 nm, in which the fluctuation of the extinction ratio is ±0.5 dB. The PCW device without the lattice shift exhibited high-dispersion, for which a large or small value of <i>n</i>_g can be set on demand by changing the wavelength. It was found that for a large <i>n</i>_g, the frequency response was degraded due to the electro-optic phase mismatch between the RF signals and slow-light even for such small-size modulators. Meander-line electrodes, which bypass and delay the RF signals to compensate for the phase mismatch, are proposed. A high cutoff frequency of 55 GHz was theoretically predicted, whereas the experimentally measured value was 38 GHz. A high-quality open eye pattern for a drive voltage of 1 V at 32 Gbps was observed. The clear eye pattern was maintained for 50-64 Gbps, although the drive voltage increased to 3.5-5.3 V. A preliminary operation of a 2-bits pulse amplitude modulation up to 100 Gbps was also attempted.</p>

  DOI CiNii

• Wide beam steering by slow-light waveguide gratings and a prism lens

  Hiroyuki Ito, Yuma Kusunoki, Jun Maeda, Daichi Akiyama, Naoya Kodama, Hiroshi Abe, Ryo Tetsuya, Tos … Show more authors

  Optica ( OSA Publishing )  7 ( 1 )   47 - 52   2020.01  [Refereed]

  Joint Work

  DOI

• Optimization of an H0 photonic crystal nanocavity using machine learning

  Ryotaro Abe, Taichi Takeda, Ryo Shiratori, Shinichi Shirakawa, Shota Saito, Toshihiko Baba

  Optics Letters ( OSA Publishing )  Vol.45 ( 2 )   319 - 322   2020.01  [Refereed]

  Joint Work

  DOI

• Carrier-Suppressed Single Sideband Signal for FMCW LiDAR using Si Photonic Crystal Optical Modulators

  Mikiya Kamata, Yosuke Hinakura , Toshihiko Baba

  Journal of Lightwave Technology( Early Access ) ( IEEE )  38 ( 8 )   2315 - 2321   2020.01  [Refereed]

  Joint Work

  DOI

• Optimization of atomic layer deposition temperature of ZrO2 protective coat for GaInAsP photonic crystal nanolaser sensor

  Akihiro Sakata, Keisuke Watanabe, Toshihiko Baba

  Japanese Journal of Applied Physics ( IOP Science )  59 ( 1 )   2019.12  [Refereed]

  Joint Work

  DOI

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Review Papers 【 display / non-display 】

Review Papers 【 display / non-display 】

• Silicon gets the green light

  Toshihiko Baba

  Nature Publishing Group / Nature Photonics   3 ( 4 ) 190 - 192   2009.04

  Introduction and explanation (scientific journal)   Single Work

• Photonic crystals remember the light

  Toshihiko Baba

  Nature Publishing Group / Nature Photonics   1 ( 1 ) 11 - 12   2007.01

  Introduction and explanation (scientific journal)   Single Work

• Holey VCSEL produce high powers

  A. Furukawa and S. Sasaki, M. Hoshi, A. Matsuzono, K. Moritoh and T. Baba

  optics.org     2004.12

  Introduction and explanation (others)   Joint Work

• The forbidden beauty of quasicrystals

  Physics World     2004.12

  Introduction and explanation (others)   Joint Work

• Roadmap on Photonic Crystals

  Kluwer Academic     2003.05

  Introduction and explanation (others)   Joint Work

Industrial Property 【 display / non-display 】

Industrial Property 【 display / non-display 】

• Method for manufacturing surface-emitting semiconductor laser

  Industrial Property No 7,678,598 B2  Patent No 7,678,598 B2

  T. Baba, A. Matsuzono, A. Furukawa, S. Sasaki and M. Hoshi

• Optical Control Device

  Industrial Property No US Patent No. 7,369,734  Patent No US Patent No. 7,369,734

  T. Sakai, I. Katoh and T. Baba

• Optical control element

  Industrial Property No US Patent, no. 7,123,804  Patent No US Patent, no. 7,123,804

  T. Baba and D. Mori

• Surface emitting semiconductor laser and method for manufacturing thereof as well as optical device

  Industrial Property No 0  Patent No US Patent, no. 10/977,197

  T. Baba, A. Matsuzono, A. Furukawa, S. Sasaki and M. Hoshi

• Optical element

  Patent No US 6522448 B2

Academic Awards Received 【 display / non-display 】

Academic Awards Received 【 display / non-display 】

• IEEE/LEOS Distinguished Lecture

  2007.10.22   IEEE/LEOS  

  Winner： Toshihiko Baba

• Marubun Research Encouragement Award

  2000.02    

• Paper Award of IEICE

  1994.04    

• IEEE/Photonics Society iNOW Best Poster Award

  2009.08.14    

• Best Paper Award of Micro-Optic Conference

  1999.07    

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Grant-in-Aid for Scientific Research 【 display / non-display 】

Grant-in-Aid for Scientific Research 【 display / non-display 】

• Grant-in-Aid for Scientific Research(S)

  Project Year： 2016.04  -  2021.03 

• Grant-in-Aid for Scientific Research(S)

  Project Year： 2012.04  -  2016.03 

Other external funds procured 【 display / non-display 】

Other external funds procured 【 display / non-display 】

• Development of high-resolution LIDAR system based on slow-light structures

  Offer organization: Japan Science and Technology Agency  ACCEL

  Project Year： 2016.08  -    Investigator(s): Toshihiko Baba

Presentations 【 display / non-display 】

Presentations 【 display / non-display 】

• Photonic integrated circuits with slow light

  SPIE Photonics West  (San Francisco)  2014.02  

• Photonic crystal nanolaser biosensors

  Int. Workshop Fab. Appl. Microstructured Opt. Dev.  (Yokohama)  2014.02  

• Specific detection of marker protein related with Alzheimer's disease using photonic crystal nanolaser sensor array

  Mat. Res. Soc. Annual Meet.  (Boston)  2013.12  

• Wide wavelength and temperature tolerance in 10 Gbps photonic crystal modulators

  Int. Sympo. Photon. Electron. Convergence  (Tokyo)  2013.11  

• Photonic crystal modulators and related slow light devices in Si photonics

  OSA FiO/LS integrated photonics  (Orlando)  2013.10  

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Preferred joint research theme 【 display / non-display 】

Preferred joint research theme 【 display / non-display 】

Past of Collaboration and Commissioned Research 【 display / non-display 】

Past of Collaboration and Commissioned Research 【 display / non-display 】

• LiDAR device based on slow light waveguides

  Funded Research on Investiment  

  Project Year： 2016.08  -   

• Nano-photonic devices

  Funded Research offered by Enterprises  

  Project Year： 2009.07  -   

• Bio-sensing

  Cooperative Research within Japan  

  Project Year： 2009.04  -   

• Si photonics devices

  Others  

  Project Year： 2008.06  -   

• Development of photonic crystal VCSELs

  Cooperative Research within Japan  

  Project Year： 2002.04  -  2004.03 

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