Watanabe, Shinichi

写真a

Affiliation

Faculty of Science and Technology, Department of Physics （Yagami）

Position

Professor

E-mail Address

E-mail address

External Links
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Career 【 Display / hide 】

  • 1999.04
    -
    2002.03

    Research Fellow of the Japan Society for the Promotion of Science (DC1)

  • 2002.04
    -
    2004.03

    JSPS Postdoctoral Fellow for Research Abroad

  • 2004.04
    -
    2004.07

    Collaborator Scientific

  • 2004.08
    -
    2007.03

    Assistant Professor (University of Tokyo)

  • 2007.03
    -
    2011.03

    Assistant Professor

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Academic Background 【 Display / hide 】

  • 1997.03

    The University of Tokyo, Faculty of Science, Department of Physics

    University, Graduated

  • 1999.03

    The University of Tokyo, Graduate School of Science, Physics Department

    Graduate School, Completed, Master's course

  • 2002.03

    The University of Tokyo, Graduate School of Science, Physics Department

    Graduate School, Completed, Doctoral course

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Academic Degrees 【 Display / hide 】

  • Doctor of Science, The University of Tokyo, Coursework, 2002.03

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Research Areas 【 Display / hide 】

  • Optical engineering, Photon science (Applied Optics/Quantum Optical Engineering)

  • Condensed matter physics I (Physical Properties I)

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Research Keywords 【 Display / hide 】

  • Terahertz Spectroscopy

  • Semiconductor Nanostructures

  • Organic Conductors

  • Ultrafast Spectroscopy

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Papers 【 Display / hide 】

  • Internal Status of Visibly Opaque Black Rubbers Investigated by Terahertz Polarization Spectroscopy: Fundamentals and Applications

    M. Okano, and S. Watanabe

    Polymers （Polymers)  11 （ 1 ） 9 2018.12

    Research paper (scientific journal), Joint Work, Accepted

    　View Summary

    © 2018 by the authors. We discuss the internal status of rubber composites consisting of an insulating rubber matrix and conductive carbon black (CB) fillers ("black rubber") using polarization-sensitive terahertz time-domain spectroscopy (THz-TDS). The black rubber composites under stretched conditions exhibit a large optical anisotropy or birefringence in the terahertz regime. From systematic studies, it is revealed that the large birefringence of black rubbers is due to the orientation distribution of anisotropically shaped CB aggregates in the rubber matrix and the orientation distribution is strongly linked to the mechanical deformation of the black rubber. A model simulation based on this relation between deformation and reorientation allows conversion of the birefringence (optical) information into strain (mechanical) information. In addition, the spectroscopic information obtained using the THz-TDS technique is useful to evaluate the changes in the internal conductive filler network caused by the mechanical deformation. Our findings demonstrate that the terahertz polarization spectroscopy is a promising nondestructive inspection method for contactless investigation of the internal condition of black rubber composites.

  • Impact of carbon black aggregates on the optical properties of black rubber samples in the terahertz frequency range(accepted for publication)

    S. Watanabe, M. Fujii, and M. Okano

    Advanced Materials Letters （VBRI Press)  10 （ 1 ） 48 - 51 2018.12

    Research paper (scientific journal), Joint Work, Except for reviews

  • Terahertz polarization imaging and its applications

    Watanabe S.

    Photonics （Photonics)  5 （ 4 ）  2018.12

    　View Summary

    © 2018 by the author. This review focuses on several recent research activities regarding precise and fast polarization-sensitive terahertz time-domain spectroscopy systems for imaging purposes, and explains three interesting application examples. Owing to modulation techniques that have recently been developed for the evaluation of the instantaneous terahertz electric-field (E-field) vector, fast and precise terahertz polarization imaging becomes feasible. This terahertz technology enables high-resolution surface topography, precise understanding of the spatial E-field vector distribution of the focused terahertz pulse, and examination of strain-induced birefringence in polymeric materials. These examples constitute a new application area of terahertz photonics with emphasis on both fundamental optics and industrial applications.

  • Inspection of internal filler alignment in visibly opaque carbon-black–rubber composites by terahertz polarization spectroscopy in reflection mode

    Okano M., Watanabe S.

    Polymer Testing （Polymer Testing)  72   196 - 201 2018.12

    ISSN  01429418

    　View Summary

    © 2018 As the industrial utilization of polymeric materials is increasing owing to recent improvements in material durability and functionality, product safety becomes an important issue. Therefore, various inspection methods for polymeric materials are being developed. In this work, the rapid and non-destructive inspection of the averaged internal orientation of conductive carbon black fillers in rubber composites is demonstrated using a handmade high-speed terahertz polarization spectroscopy system that employs reflection geometry. From the birefringent information obtained from the black rubber sample (with arbitrary stretching condition), the internal orientation of the conductive fillers, which plays an essential role in the properties of the rubber composite, was determined. In addition, since data acquisition with the reflection method is fast, the spatially resolved measurement of the filler orientation could also be performed. The information of the internal orientation of the carbon black fillers allows verification of the condition of the rubber product.

  • Optical Response Change of Black Rubbers under Cyclic Deformation Investigated by Terahertz Polarization Spectroscopy

    Tsujimoto T., Moriwaki A., Fujii M., Okano M., Watanabe S.

    International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz （International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz)  2018-September 2018.10

    ISSN  9781538638095

    　View Summary

    © 2018 IEEE. We recently demonstrated the nondestructive and contactless inspection of visibly-opaque black rubbers with a conductive carbon fillers, which is required for the rubber industrial community, by terahertz polarization spectroscopy. Using our developed technique, in this work, the terahertz optical and mechanical properties of the black rubbers were simultaneously measured under cyclic deformation. The black rubbers show the hysteresis in the draw ratio dependence of the terahertz birefringence as well as the well-known hysteresis behavior in the stress. The result implies that the terahertz optical response of black rubbers have correlation with their mechanical properties.

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Papers, etc., Registered in KOARA 【 Display / hide 】

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Reviews, Commentaries, etc. 【 Display / hide 】

  • 高分子材料における異方性のテラヘルツセンシング（掲載許可済）

    渡邉 紳一、岡野 真人、中迫 雅由

    レーザー研究 (一般社団法人レーザー学会)  47 ( 1 )  2019.02

    Introduction and explanation (scientific journal), Joint Work

  • テラヘルツ偏光分光法を用いた黒色ゴム材料の非破壊検査技術と応用展開(掲載許可済)

    渡邉 紳一、岡野 真人

    応用物理 (公益社団法人 応用物理学会)   2019.02

    Introduction and explanation (scientific journal), Joint Work

  • Terahertz polarization imaging and its applications

    S. Watanabe

    Photonics (MDPI)  5 ( 4 ) 58 2018.12

    Introduction and explanation (scientific journal), Single Work

  • テラヘルツ偏光計測による黒色ゴム材料内部のフィラー構造検査

    岡野 真人、渡邉 紳一

    光アライアンス 29 ( 7 ) 33 - 36 2018.07

    Introduction and explanation (commerce magazine), Joint Work

  • テラヘルツ偏光計測による黒色ゴムの内部歪み検査

    森脇 淳仁、岡野 真人、渡邉 紳一

    検査技術 23 ( 6 ) 9 - 14 2018.06

    Introduction and explanation (commerce magazine), Joint Work

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Presentations 【 Display / hide 】

  • ダブル光パルス励起による強磁性体の磁化歳差運動モード制御

    高橋知宏, 岡野真人, 渡邉紳一

    日本物理学会第74回年次大会 (九州大学（伊都キャンパス）) , 2019.03, Poster (general), 日本物理学会

  • テラヘルツ偏光計測による繰り返し伸縮に伴う黒色ゴム内部構造変化の研究

    辻本敬斗, 森脇淳仁, 藤井美佐子, 岡野真人, 渡邉紳一

    日本物理学会第74回年次大会 (九州大学（伊都キャンパス）) , 2019.03, Oral Presentation(general), 日本物理学会

  • デュアルコム分光法による複素屈折率の異方性計測

    住原花奈, 大久保章, 小口研一, 稲場肇, 渡邉紳一

    日本物理学会第74回年次大会 (九州大学（伊都キャンパス）) , 2019.03, Oral Presentation(general), 日本物理学会

  • テラヘルツ光学伝導度測定を通じた黒色ゴムの内部伝導ネットワーク構造の推定

    岡野真人, 渡邉紳一

    日本物理学会第74回年次大会 (九州大学（伊都キャンパス）) , 2019.03, Oral Presentation(general), 日本物理学会

  • テラヘルツ偏光測定を用いた黒色ゴムの応力緩和現象の観察

    森脇淳仁, 岡野真人, 渡邉紳一

    日本物理学会第74回年次大会 (九州大学（伊都キャンパス）) , 2019.03, Oral Presentation(general), 日本物理学会

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Research Projects of Competitive Funds, etc. 【 Display / hide 】

  • 高分子破壊現象プローブのための動的テラヘルツ劣化観察装置の開発

    2018.04
    -
    2021.03

    Grant-in-Aid for Scientific Research, Research grant, Principal Investigator

  • テラヘルツ偏光イメージング分析技術の成果事業化検証のための装置開発

    2017.10
    -
    2018.03

    科学技術振興機構, 大学発新産業創出プログラム 社会還元加速プログラム（SCORE), Commissioned ｒesearch, Principal Investigator

  • 偏光コム分光法の創出

    2016.04
    -
    2018.03

    Grant-in-Aid for Scientific Research, 渡邉紳一, Principal Investigator

  • 高速・高精度テラヘルツ時間領域分光ポーラリメータの開発と産業応用展開

    2014.09
    -
    2019.03

    科学技術振興機構, 産学共創基礎基盤研究プログラム, Commissioned ｒesearch, Principal Investigator

  • 高速・高精度テラヘルツ偏光スペクトル計測を用いた非破壊・非接触イメージング技術の研究開発

    2014.08
    -
    2015.03

    総務省, 戦略的情報通信研究開発推進事業, Commissioned ｒesearch

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Works 【 Display / hide 】

  • テラヘルツ光で見るゴム深部のひずみ ─光でミクロの構造に迫る─

    渡邉紳一

    JSTニュース２０１７年９月号, 

    2017.09
    -
    Present
    , 

    Other, Single

  • 日経産業新聞　朝刊８面

    2017.01
    -
    Present
    , 

    Other, Joint

  • 化学工業日報　朝刊8面

    WATANABE SHINICHI

    2012.07
    -
    Present
    , 

    Other

  • 日経産業新聞　朝刊11面

    WATANABE SHINICHI

    2012.07
    -
    Present
    , 

    Other

  • 日刊工業新聞　朝刊17面

    WATANABE SHINICHI

    2012.07
    -
    Present
    , 

    Other

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Intellectual Property Rights, etc. 【 Display / hide 】

  • 光学測定装置、光学測定方法、及び応力検査方法

    Application No.： PCT/JP2017/030814  2017.08 

    Patent, Joint, PCT international application

  • 光学測定装置、光学測定方法、及び応力検査方法

    Application No.： 特願2016-167370  2016.08 

    Patent, Joint, National application

  • デュアルコム分光法を用いた偏光計測装置及び偏光計測方法

    Application No.： 特願2016-017537  2016.02 

    Patent, Joint

  • 偏波解析装置、及び偏波解析方法

    Application No.： 特願2015-124617  2015.06 

    Patent, Joint

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Awards 【 Display / hide 】

  • IAAM Scientist Medal

    Shinichi Watanabe, 2018.05, International Association of Advanced Materials, Terahertz polarization spectroscopy as a novel tool for nondestructive internal strain sensing of rubber and polymeric materials

    Country： Sweden

    　View Description

    New Age Technology and Innovations 分野における著しく優れた研究による

  • 第42回（2017年春季）応用物理学会講演奨励賞受賞

    森脇淳仁、岡野真人、渡邉紳一, 2017.09, 応用物理学会, テラヘルツ偏光計測による黒色ゴム材料の内部歪みイメージング

  • Best Student Papers

    K. Sumihara, S. Okubo, M. Okano, H. Inaba, and S. Watanabe, 2017.03, Optical Society of America, Development of Precise Polarization Measurement System Using Dual-comb Spectroscopy

  • The Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology, The Young Scientists’ Prize

    Shinichi Watanabe, 2014.04, Ministry of Education, Culture, Sports, Science and Technology, テラヘルツ新分光技術の開拓と物質科学応用に関する研究

  • Young Scientist Award of the Physical Society of Japan

    WATANABE SHINICHI, 2012.03, The Physical Society of Japan, Experimental studies on non-equilibrium carrier dynamics in low-dimensional organic materials by time-resolved terahertz spectroscopy

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Courses Taught 【 Display / hide 】

  • TOPICS IN OPTICAL CONDENSED MATTER PHYSICS

    2019

  • SOLID STATE PHYSICS 3

    2019

  • SOLID STATE PHYSICS 1

    2019

  • PHYSICS LABORATORIES 2

    2019

  • PHYSICS LABORATORIES 1

    2019

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Courses Previously Taught 【 Display / hide 】

  • 物性物理学第１

    慶應義塾大学, 2018

  • 光物性物理学特論

    慶應義塾大学, 2018

  • 物理学実験Ｉ，ＩＩ

    慶應義塾大学, 2018

  • 物理学B

    慶應義塾大学, 2018

  • 自然科学実験

    慶應義塾大学, 2018

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Social Activities 【 Display / hide 】

  • 東京大学理学系ＣＯＥ合同若手シンポジウム実行委員会

    2006.02
    -
    2006.07

    　View Summary

    物理学専攻教員代表

  • 第10回関東光科学若手研究会企画・運営

    2015.04
    -
    2015.10
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Memberships in Academic Societies 【 Display / hide 】

  • テラヘルツテクノロジーフォーラム委員会,研究交流委員会,基礎部門, 

    2010.06
    -
    Present

  • 日本物理学会, 

    1997.06
    -
    Present

  • 応用物理学会, 

    2007.01
    -
    Present

  • 高分子学会, 

    2015.10
    -
    Present

  • The Optical Society (OSA), 

    2013.01
    -
    Present

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Committee Experiences 【 Display / hide 】

  • 2018.05
    -
    Present

    総務委員会委員長（理事）, テラヘルツテクノロジーフォーラム

  • 2015.04
    -
    2018.05

    総務委員会委員, テラヘルツテクノロジーフォーラム

  • 2015.04
    -
    2017.03

    機関誌編集委員, 応用物理学会

  • 2012.04
    -
    2014.03

    新著紹介小委員会委員, 一般社団法人日本物理学会

  • 2010.06
    -
    Present

    委員, テラヘルツテクノロジーフォーラム委員会,研究交流委員会,基礎部門

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