Nihei, Eisuke

写真a

Affiliation

Faculty of Science and Technology, Department of Applied Physics and Physico-Informatics (Yagami)

Position

Associate Professor
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Career 【 Display / hide 】

  • 1990.04
    -
    1997.03

    慶應義塾大学（理工学部），助手

  • 1997.04
    -
    2017.03

    慶應義塾大学（理工学部），専任講師

  • 2017.04
    -
    Present

    慶應義塾大学（理工学部），准教授

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Academic Background 【 Display / hide 】

  • 1985.03

    Keio University, Faculty of Science and Engineering, 応用化学科

    University, Graduated

  • 1987.03

    Keio University, Graduate School, Division of Science and Engineeri, 応用化学専攻

    Graduate School, Completed, Master's course

  • 1990.03

    Keio University, Graduate School, Division of Science and Engineeri, 応用化学専攻

    Graduate School, Completed, Doctoral course

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Academic Degrees 【 Display / hide 】

  • Ph.D, Keio University, Coursework, 1990.03

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Research Areas 【 Display / hide 】

  • Natural Science / Mathematical physics and fundamental theory of condensed matter physics (Mathematical Physics/Fundamental Theory of Physical Properties)

  • Nanotechnology/Materials / Structural materials and functional materials (Structural/Functional Materials)

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Research Keywords 【 Display / hide 】

  • optics

  • ray trace

  • Refractive-index control

  • materials

  • Luminescence materials

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Books 【 Display / hide 】

  • "Nonlinear Dynamics in Polymeric Systems",ACS Symposium Series No. 869

    K. Asakura, E. Nihei, H. Harasawa, A. Ikumo, S. Osanai, 2003.10

    Scope: 135-146

  • 季刊　科学総説　透明ポリマーの屈折率制御

    小池康博、二瓶栄輔, 日本化学会編, 1998.11

    Scope: 37-50

    　View Summary

    屈折率分布型光学材料が高速伝送可能なポリマー光ファイバーに応用可能であることを示し、実際の作製方法、作製された素子の光学特性を評価し、屈折率分布型光学素子が、これまでの素子では実現できない優れた特性を有していることを明らかにしている。

  • 季刊　科学総説　透明ポリマーの屈折率制御

    小池康博、二瓶栄輔, 日本化学会編, 1998.11

    Scope: 63-74

    　View Summary

    屈折率分布型光学材料が高機能なポリマー光学レンズに応用可能であることを示し、実際の作製方法、作製された素子の光学特性を評価し、屈折率分布型光学素子が、これまでの素子では実現できない優れた特性を有していることを明らかにしている。

  • ACS (American Chemical Society) Books, ACS symposium series 672 Photonics and Optoelectronic Polymers

    二瓶栄輔、石榑崇明、小池康博, American chemical society, 1997.09

    Scope: 16-29

    　View Summary

    屈折率分布型ポリマー光ファイバーの最適な屈折率分布係数を、材料分散、及び光源の波長分散まで、考慮に入れて理論的に正確に求めた。その結果、材料分散の少ない、含フッ素ポリマー材料を用いることにより、１００ｍの長さで最大伝送帯域は約10Ｇｂｐｓであることが示された

  • ACS (American Chemical Society) Books, ACS symposium series 672 Photonics and Optoelectronic Polymers

    岩田修一、塚原宇、二瓶栄輔、小池康博, American chemical society, 1997.09

    Scope: 58-70

    　View Summary

    ポリマー鎖の配向に起因する配向複屈折現象は、ポリマー材料の偏光特性を著しく劣化させる。この現象により、ポリマー材料の光学素子への応用範囲が限定されてしまう。そこで、正、負の配向複屈折を与えるモのマーを共重合する方法と、異方性の大きな低分子をドープする２つの異なる方法により配向複屈折の消去素試みたところ、射出成形しても配向複屈折を全く生じないポリマー材料の開発に成功した。

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Papers 【 Display / hide 】

  • Stress-induced absorption of a birefringence-reduced polymer optical fiber with doped core

    Keigo Uzawa, Takamichi Tozaki, Kentaro Yano, Eisuke Nihei, and Rei Furukawa

    Japanese Journal of Applied Physics (The Japan Society of Applied Physics)  59 ( SD ) DF06-1 - DF06-7 2019.12

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  00214922

    　View Summary

    A poly[(methyl methacrylate/2,2,2-trifluoroethyl methacrylate/benzyl methacrylate) = 52/42/6 (w/w/w)] copolymer was used to form the core of a
    polymer optical fiber (POF) with the purpose of fabricating a birefringence-reduced core (BRC). The fabricated POF showed almost no phase shift,
    regardless of the stress that was applied to the fiber. Therefore, it is possible to maintain the polarization in the POF core, which is an important
    factor for detection of the direction in which stress is applied to the POF. To detect the stress direction, the core of a BRC–POF was doped with
    dichroic dye. A doped BRC–POF that was fabricated using magenta dye showed variations in its output under operating conditions where the
    stress vector and the incident polarization formed different angular relationships. The results presented here are considered to be applicable to
    detailed structural monitoring using POFs.

  • Proposal and Fabrication of Negative-Type Refractive Index Distribution Polymer Optical Fiber

    Kenji Tsukada Yumi Nakagawa Kouichi Asakura Eisuke Nihei

    International Journal of New Technology and Research (Nextgen Research Publication)  2 ( 11 ) 45 - 50 2016.11

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  2454-4116

    　View Summary

    In this paper, we propose a new type of graded index polymer optical fiber (GI-POF). We call its distribution “negative refractive index distribution (N-GI)” where the refractive index is lowest around the central axis and highest at the core-cladding boundary. The N-GI-POF was successfully fabricated by multi-step interfacial gel polymerization technique and UV assisted frontal polymerization technique.

  • Color control of electrochemiluminescence based on duty ratio of applied waveform voltage

    RYOICHI NISHIMURA NIHEI EISUKE

    Japanese Journal of Applied Physics (The Japan Society of Applied Physics)  55   042101-1 - 042101-5 2016.03

    Research paper (scientific journal), Joint Work, Accepted

    　View Summary

    We succeeded in controlling the light-emitting color obtained from the light-emitting surface of an organic electrochemiluminescence (ECL) device with a duty ratio of the applied voltage.

  • Ray tracing method in arbitrarily shaped radial graded-index waveguide

    TSUKADA KENJI NIHEI EISUKE

    applied optics (Optical Society of America)  54 ( 29 ) 8795 - 8799 2015.10

    Research paper (scientific journal), Joint Work, Accepted

    　View Summary

    In this paper, the new ray tracing method in arbitrarily shaped radial graded-index wave guide was proposed and it was clearly that this technique has highly precise.

  • Fabrication of Defocus Graded-Index Optical Waveguide for Evanescent Wave Optical Amplifier

    HIRAI TAKAYUKI NIHEI EISUKE

    OPTICAL REVIEW (Optical Society of Japan)  Vol.21, No.2   110 - 112 2014.04

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  1340-6000

    　View Summary

    光発散特性を持つプラスチック光導波路を蛍光色素溶液に浸漬させ、この溶液を励起状態に保つことで、エバネッセント波に基づく光増幅素子を作製し、実際に増幅現象を確認した。これにより、これまで報告されていなかったプラスチック光ファイバー用の連続光増幅素子を実現することができることを明らかにした。

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Presentations 【 Display / hide 】

  • Low Tg Negative Graded Index Plastic Optical Fiber

    UEKI SHUNTA NIHEI EISUKE

    The 65nd Spring Meeting, 2018. The Japan Society of Applied Physics and the Related Societies (Tokyo (WASEDA University)) , 

    2018.03
    , 

    Poster presentation, The Japan Society of Applied Physics

    　View Summary

    A light branch device with the high branch efficiency was achieved using the negative refractive index distribution type plastic optic fiber with low Tg.

  • Improvement of Luminescence Property of ECL Device using a Plurality of Low Molecular Compounds

    TAKAYAMA HIROYUKI NIHEI EISUKE

    The 65nd Spring Meeting, 2018. The Japan Society of Applied Physics and the Related Societies (Tokyo (WASEDA University)) , 

    2018.03
    , 

    Oral presentation (general), The Japan Society of Applied Physics

    　View Summary

    Improvement of luminescence property was achieved by adding more than one low molecular compound to a electrochemluminescence device.

  • Output Beam Analysis of the Fluorophore-Doped Polymer Optical Fiber Under the Normal Stress

    MIZOROGI DAICHI MAKINO KENJI NISHIMURA RYOICHI TSUKADA KENJI NIHEI EISUKE FURUKAWA REI

    The 62nd Spring Meeting, 2015. The Japan Society of Applied Physics and the Related Societies (Hiratsuka City (Tokai University)) , 

    2015.03
    , 

    Poster presentation, The Japan Society of Applied Physics

    　View Summary

    An optical characteristic change in a fiber was found by adding a stress from outside to the polymer optical fiber to which a dye was added, and an achieved possibility of the stress sensor using this fiber was indicated.

  • Fabrication and Light Branching of Negative Type GI Plastic Optical Fiber

    TSUKADA KENJII ASAKURA KOICHI NIHEI EISUKE

    The 23rd International Conference on Plastic Optical Fibers (Yokohama city (Keio University)) , 

    2014.10
    , 

    Poster presentation, POF Consortium

    　View Summary

    It was done clearly that reproducibility can make the negative graded-index type polymer optic fiber from a UV assist frontal polymerization technique of ultraviolet rays, and it was reported that a light branch device using this can be achieved easily.

  • Electrogenerated Chemiluminescence with Comb-Shaped Electrode

    NISHIMURA RYOICHI NIHEI EISUKE

    The 75th JSAP　Autumn Meeting, 2014 (Sapporo city (Hokkaido University)) , 

    2014.09
    , 

    Oral presentation (general), The Japan Society of Applied Physics

    　View Summary

    It was confirmed that a change in the amount of the luminous solution doesn't have an influence on the luminous intensity by using comb-shaped electrode in a electrochemiluminescence device.

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Intellectual Property Rights, etc. 【 Display / hide 】

  • 蓄熱効果を利用する自発的フロンタルポリメリぜーションによる改良された屈折率分布型光伝送体の作製方法

    Date applied： 特願2005-219283  2005.07 

    Date issued： 特許第4868383  2011.11

    Patent, Joint

  • 蓄熱効果を利用する自発的フロンタルポリメリゼーションによる屈折率分布型光伝送体の作製方法

    Date applied： 特願2005-504709  2004.01 

    Date issued： 特許第4270571  2009.03

    Patent, Joint

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Awards 【 Display / hide 】

  • 回路実装学会論文賞

    二瓶 栄輔, 1998.03, 回路実装学会

  • MOC/GRIN Paper Award

    二瓶 栄輔, 1997.05, 応用物理学会

  • Best Post Paper Award

    二瓶 栄輔, 1997.05, Society for International Display(SID)1996 International Symposium

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Courses Taught 【 Display / hide 】

  • PRESENTATION TECHNIQUE

    2024

  • PHOTONIC MATERIALS

    2024

  • OPTICS

    2024

  • NANO SCALE SCIENCE JOINT SEMINAR

    2024

  • MATERIAL DESIGN SCIENCE JOINT SEMINAR

    2024

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Courses Previously Taught 【 Display / hide 】

  • 理工学基礎実験

    Keio University

    2015.04
    -
    2016.03
    , 

    Spring Semester, Laboratory work/practical work/exercise, Lecturer outside of Keio

  • プレゼンテーション技法

    Keio University

    2015.04
    -
    2016.03
    , 

    Full academic year, Other, Lecturer outside of Keio

  • 総合デザイン工学特別研究第１

    Keio University

    2015.04
    -
    2016.03
    , 

    Full academic year, Other

  • 総合デザイン工学課題研究

    Keio University

    2015.04
    -
    2016.03
    , 

    Full academic year

  • 卒業研究

    Keio University

    2015.04
    -
    2016.03
    , 

    Full academic year, Other, Within own ｆaculty

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Memberships in Academic Societies 【 Display / hide 】

  • 応用物理学会

    　

  • 高分子学会

    　

  • 繊維学会

    　

  • 日本建築学会

    　
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Committee Experiences 【 Display / hide 】

  • 1998.04
    -
    1999.09

    世話人, 応用物理学会分科会

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