Watanabe, Shinichi

写真a

Affiliation

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

Position

Professor

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 】

  • Natural Science / Semiconductors, optical properties of condensed matter and atomic physics (Physical Properties I)

  • Nanotechnology/Materials / Optical engineering and photon science (Applied Optics/Quantum Optical Engineering)

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Research Keywords 【 Display / hide 】

  • Terahertz Spectroscopy

  • Semiconductor Nanostructures

  • Organic Conductors

  • Ultrafast Spectroscopy

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Books 【 Display / hide 】

  • 基礎高分子科学 第２版

    渡邉 紳一, 2020.01

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Papers 【 Display / hide 】

  • Integer-locking condition for stable dual-comb interferometry in situations with fluctuating frequency-comb repetition rates.

    R. Shibata, S. Fujii, and S. Watanabe

    Opt. Express 32 （ 10 ） 17373 - 17387 2024.04

    Research paper (scientific journal), Joint Work, Last author, Corresponding author, Accepted

  • Spatiotemporal visualization of a surface acoustic wave coupled to magnons across a submillimeter-long sample by pulsed laser interferometry.

    K. Maezawa, S. Fujii, K. Yamanoi, Y. Nozaki, and S. Watanabe

    Phys. Rev. Applied  21 （ 4 ） 044047 2024.04

    Research paper (scientific journal), Joint Work, Last author, Corresponding author, Accepted

    　View Summary

    Surface acoustic waves (SAWs) coupled to magnons have attracted much attention because they allow for the long-range transport of magnetic information that cannot be achieved by magnon alone. We employed pulsed laser interferometry to visualize the entire spatiotemporal dynamics of a SAW that travels on a nickel (Ni) thin film and is coupled to magnons. It was possible to trace the coupling-induced amplitude reduction and phase shift that occurs as the SAW propagates over a distance of 0.4 mm. The observed changes are consistent with results obtained from conventional radio-frequency transmission measurements, which probe the total SAW absorption due to magnon-phonon coupling. This result verifies that our method can accurately capture the spatiotemporal dynamics of a SAW coupled to magnons across the entire length of the sample. Additionally, we validated our time-resolved profiles by comparing them with theoretical results that take the echo wave due to reflection into account. The impact of the echo wave is significant even when it has propagated over a distance of the order of millimeters. Our imaging results highlight the visualization of the long-range propagation of the SAW coupled to magnons and offer more information about the surface vibration profiles in such devices.

  • A two-color dual-comb system for time-resolved measurements of ultrafast magnetization dynamics using triggerless asynchronous optical sampling

    （D. Nishikawa, K. Maezawa, S. Fujii, M. Okano, S. Watanabe)  94   063003 2023.06

    Research paper (scientific journal), Joint Work, Accepted

  • Temporal-offset dual-comb vibrometer with picometer axial precision

    A. Iwasaki, D. Nishikawa, M. Okano, S. Tateno, K. Yamanoi, Y. Nozaki, S. Watanabe

    APL Photonics 7 （ 10 ） 106101 2022.10

    Research paper (scientific journal), Joint Work, Last author, Corresponding author, Accepted

    　View Summary

    We demonstrate a dual-comb vibrometer where the pulses of one frequency-comb
    are split into pulse pairs. We introduce a delay between the two pulses of each
    pulse pair in front of the sample, and after the corresponding two consecutive
    reflections at the vibrating sample surface, the initially introduced delay is
    cancelled by a modified Sagnac geometry. The remaining phase difference between
    the two pulses corresponds to the change in the axial position of the surface
    during the two consecutive reflections. The Sagnac geometry reduces the effect
    of phase jitter since both pulses propagate through nearly the same optical
    path (in opposite directions), and spurious signals are eliminated by time
    gating. We determine the amplitude of a surface vibration on a
    surface-acoustic-wave device with an axial precision of 4 pm. This technique
    enables highly accurate determination of extremely small displacements.

  • Triggerless data acquisition in asynchronous optical-sampling terahertz time-domain spectroscopy based on dual-comb system

    M. Okano, and S. Watanabe

    Opt. Express 30 （ 22 ） 39613 - 39623 2022.10

    Research paper (scientific journal), Joint Work, Last author, Accepted

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

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Reviews, Commentaries, etc. 【 Display / hide 】

  • デュアルコム・サニャック干渉計を用いた高精度な表面弾性波の計測

    渡邉紳一

    光学 53 ( 2 )  2024.02

    Article, review, commentary, editorial, etc. (scientific journal), Single Work, Lead author, Last author, Corresponding author

  • テラヘルツ誘電分光法によるカーボンブラック充填ゴムの変形にともなう不可逆誘電率変化の検査

    岡野真人、水田圭祐、渡邉紳一、森本崇宏、阿多誠介

    検査技術 27 ( 10 ) 15 - 20 2022.10

    Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media), Joint Work

  • テラヘルツセンシングで見えるもの～高分子材料評価への応用～

    渡邉紳一, 岡野真人

    一般財団法人電波技術協会 協会報FORN  ( 11 )  2020.11

    Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media), Joint Work

  • テラヘルツ偏光計測による高分子材料の内部異方性検査

    岡野真人, 渡邉紳一

    プラスチックス  ( 10 ) 22 - 25 2019.10

    Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media), Joint Work

  • テラヘルツ分光技術の化学・生命科学への応用

    渡邉紳一

    光学 48 ( 10 ) 396 - 401 2019.10

    Article, review, commentary, editorial, etc. (scientific journal), Single Work

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Presentations 【 Display / hide 】

  • Optical frequency comb metrology for spintronic device characterization

    S. Watanabe, D. Nishikawa

    MRM2023/IUMRS-ICA2023, 

    2024.12
    , 

    Oral presentation (general)

  • Visible frequency comb generation based on spectral expansion of a frequency-referenced Er-fiber comb

    Y. Takahashi, T. Yamamoto, R. Shibata, H. Kumazaki, S. Watanabe, S. Fujii

    CLEO-PR, 

    2024.08
    , 

    Oral presentation (general)

  • Photo-induced surface vibration movie with 23,000 frames using dual-comb based asynchronous optical sampling system

    D. Nishikawa, K. Maezawa, R. Shibata, S. Watanabe

    2024.08
    , 

    Oral presentation (general)

  • Direct imaging of spatial decay profiles of surface acoustic waves due to magnon-phonon coupling in ferromagnets

    K. Maezawa, S. Fujii, K. Yamanoi, Y. Nozaki, S. Watanabe

    International Conference on Magnetism, 

    2024.06
    -
    2024.07
    , 

    Poster presentation

  • ErファイバーコムとYbファイバー増幅器を用いた可視域光コムの開発

    高橋 悠太、山本 拓海、柴田 理来、渡邉 紳一、藤井 瞬

    2024.03
    , 

    Poster presentation

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

  • 光ビッグデータの遠隔共有による次世代量子計測・量子通信技術の確立

    2024.04
    -
    Present

    慶應義塾大学, 次世代研究プロジェクト推進プログラム, Other, Principal investigator

  • Visualisation and manipulation of the mechano-spin conversion by non-contact optical measurement

    2023.04
    -
    2026.03

    基盤研究(B), Principal investigator

  • ナノ構造制御と計算科学を融合した傾斜材料開発とスピンデバイス応用

    2019.10
    -
    2025.03

    JST, CREST, Commissioned ｒesearch, Coinvestigator(s)

  • 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

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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

    Date applied： PCT/JP2017/030814  2017.08 

    Patent, Joint

  • 光学測定装置、光学測定方法、及び応力検査方法

    Date applied： 特願2016-167370  2016.08 

    Patent, Joint

  • 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

    Date applied： 特願2016-017537  2016.02 

    Patent, Joint

  • 偏波解析装置、及び偏波解析方法

    Date applied： 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 】

  • SOLID STATE PHYSICS 3

    2024

  • SOLID STATE PHYSICS 1

    2024

  • PHYSICS LABORATORIES 2

    2024

  • PHYSICS LABORATORIES 1

    2024

  • LITERATURE OF PHYSICS

    2024

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Courses Previously Taught 【 Display / hide 】

  • 物性物理学第１

    Keio University

    2020.04
    -
    2021.03
    , 

    Autumn Semester, Lecture

  • 物性物理学第３

    Keio University

    2020.04
    -
    2021.03
    , 

    Autumn Semester, Lecture, Lecturer outside of Keio

  • 物理学実験I,II

    Keio University

    2020.04
    -
    2021.03
    , 

    Full academic year, Laboratory work/practical work/exercise

  • 論文講読発表

    慶應義塾大学

    2020.04
    -
    2021.03

  • 物理学セミナー

    慶應義塾大学

    2020.04
    -
    2021.03
    , 

    Seminar, Within own ｆaculty

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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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