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Engineering educational research section Information and Communication Technology Program |
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YOKOTA Mitsuhiro
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Degree 【 display / non-display 】
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Doctor of Engineering ( 1989.2 Kyushu University )
Research Areas 【 display / non-display 】
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electron device and electronic equipment
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Nanotechnology/Materials / Optical engineering and photon science
Papers 【 display / non-display 】
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Numerical Examination on Resonance Properties of Slot Ring Resonator with Throughput and Drop Ports for Biosensing Reviewed
Mitsuhiro Yokota, and Yoshihiro Naka
Proc. of 16th International Conference on Genetic and Evolutionary Computing 2024.8
Language：English Publishing type：Research paper (international conference proceedings)
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Numerical Examination on Resonance Properties of Ring Resonatore Consisted of Slot Waveguide Reviewed
YOKOTA Mitsuhiro, NAKA Yoshihiro
IEICE Tranc C J107-C ( 7 ) 267 - 273 2024.7
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)
The resonance characteristics of a two-dimensional ring slot waveguide resonator consisting an input/output waveguide and a ring waveguide are numerically investigated using the FDTD method and the obtained results are discussed from the perspective of coupled-mode theory. Polarization deals with TM waves whose electric field has a component that crosses the slot region. In the case of a two-dimensional structure, the eigenmodes of the slot waveguide can be obtained analytically, and the eigenmodes as the incident wave in the FDTD method are applied. In the numerical calculations, the effects of the radius of the ring waveguide, the distance between the input/output waveguide and ring waveguide, and the refractive index of the background medium on the resonance characteristics are investigated. Also, the sensitivity and figure of merit (FoM), which are important evaluation indicators when using a ring resonator as a refractive index sensor are examined.
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NAKA Yoshihiro, NISHIMOTO Masahiko, YOKOTA Mitsuhiro
IEICE Transactions on Electronics E107-C ( 5 ) 141 - 145 2024.5
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：The Institute of Electronics, Information and Communication Engineers
An efficient optical power splitter constructed by a metal-dielectric-metal plasmonic waveguide with a resonator structure has been analyzed. The method of solution is the finite difference time domain (FD-TD) method with the piecewise linear recursive convolution (PLRC) method. The resonator structure consists of input/output waveguides and a narrow waveguide with a T-junction. The power splitter with the resonator structure is expressed by an equivalent transmission-line circuit. We can find that the transmittance and reflectance calculated by the FD-TD method and the equivalent circuit are matched when the difference in width between the input/output waveguides and the narrow waveguide is small. It is also shown that the transmission wavelength can be adjusted by changing the narrow waveguide lengths that satisfy the impedance matching condition in the equivalent circuit.
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NAKA Yoshihiro, NISHIMOTO Masahiko, YOKOTA Mitsuhiro
IEICE Transactions on Electronics advpub ( 0 ) 2024
Language：English Publishing type：Research paper (scientific journal) Publisher：一般社団法人 電子情報通信学会
An optical resonator with two waveguide discontinuities constructed by a metal-dielectric-metal plasmonic waveguide has been analyzed using the finite-difference time-domain (FD-TD) method with the piecewise linear recursive convolution (PLRC) method. The waveguide discontinuity has been expressed as an equivalent transmission line circuit whose circuit parameters are estimated from the reflection coefficients analyzed by the FD-TD method. We have confirmed the validity of the circuit configuration because the reflection characteristics of the equivalent circuit with the circuit parameters agree with those of the FD-TD method. Next, we have analyzed a resonator structure with two waveguide discontinuities and shown that the equivalent circuit gives a good approximation for the structure with a large difference in waveguide width at the discontinuities, in which conventional equivalent circuits had large errors.
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Analysis of Optical Resonator Constructed by Two-Dimensional MDM Plasmonic Waveguide Reviewed
NAKA Yoshihiro, NISHIMOTO Masahiko, YOKOTA Mitsuhiro
IEICE Transactions on Electronics E106-C ( 3 ) 103 - 106 2023.3
Language：English Publishing type：Research paper (scientific journal) Publisher：The Institute of Electronics, Information and Communication Engineers
An efficient bent waveguide and an optical power splitter with a resonator constructed by a metal-dielectric-metal plasmonic waveguide have been analyzed. The method of solution is the finite difference time domain (FD-TD) method with the piecewise linear recursive convolution (PLRC) method. The resonator can be realized by utilizing impedance mismatch at the connection between a narrow waveguide and an input/output waveguide. Numerical results for the bent waveguide show that transmission bands can be controlled by adjusting the length of the narrow waveguide. We have also shown that the optical power of the power splitter is entirely distributed into the output waveguide at the resonant wavelength and its distribution ratio can be controlled.
Books 【 display / non-display 】
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プロフェッショナル英和辞典 SPED TERRA 物質・工学編
編集者：堀内克明，蟹江幸博（ Role： Edit , 135単語担当）
小学館 2004.6
Language：Japanese Book type：Dictionary, encyclopedia
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ファイバー光学の基礎
黒澤 宏，横田光広（ Role： Joint author , 全208頁（分担）1-5）
オプトロニクス社（東京） 2003.1
Language：Japanese Book type：Scholarly book
MISC 【 display / non-display 】
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Extended Born Method
( 1340 ) 12 - 18 2015.5
Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
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技術者教育と優良実践研究会の活動について
石井六哉，横田光広，中野敬介
電子情報通信学会誌 91 ( 9 ) 831 - 834 2008.9
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：電子情報通信学会
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Special section on wireless technologies and computational electromagnetics
Hirose A., Yamasaki T., Ando Y., Goto N., Hattor K., Hayakawa M., Hori T., Inasawa Y., Li K., Matsumoto M., Qiang C., Shirai H., Tanaka M., Tsuji M., Yokota M., Ando M.
IEICE Transactions on Electronics E88-C ( 12 ) 2175 - 2176 2005.12
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution) Publisher：IEICE Transactions on Electronics
Presentations 【 display / non-display 】
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Characteristic analysis of ring resonator consisted of slot waveguide and its application to biosensors Invited
Mitsuhiro YOKOTA
2024.11.28
Event date： 2024.11.28
Language：Japanese Presentation type：Oral presentation (invited, special)
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【特別講演】電磁波散乱および光波伝搬の研究に携わってきて Invited
横田 光広
電子情報通信学会アンテナ・伝播研究会（IEEE AP-S Fukuoka Chapter） 2024.5.17
Event date： 2024.5.17
Language：Japanese Presentation type：Oral presentation (invited, special)
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Analysis of optical resonator structure constructed by two-dimensional MDM plasmonic waveguide(III)
Yoshihiko NAKA, Masahiko NISHIMOTO, Mitsuhiro YOKOTA
2023.11.9
Event date： 2023.11.9 - 2023.11.11
Language：Japanese Presentation type：Oral presentation (general)
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3次元人体モデルを用いた電磁波散乱に関する研究
奥川拓海, 横田光広
2023年度電気・情報関係学会九州支部連合大会 (崇城大学) 2023.9.7 電子情報通信学会
Event date： 2023.9.6 - 2023.9.7
Language：Japanese Presentation type：Oral presentation (general)
Venue：崇城大学
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センサーとして用いるFBG(Fiber Bragg Grating)の透過特性に関する数値的検討
児玉茉洸, 横田光広
2023年度電気・情報関係学会九州支部連合大会 (崇城大学) 2023.9.7 電子情報通信学会
Event date： 2023.9.6 - 2023.9.7
Language：Japanese Presentation type：Oral presentation (general)
Venue：崇城大学
Awards 【 display / non-display 】
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Best Award
2024.8 The 16th International Conference on Genetic and Evolutionary Computing Numerical Examination on Resonance Properties of Slot Ring Resonator with Throughput and Drop Ports for Biosensing
Mitsuhiro Yokota , and Yoshihiro Naka
Award type：Award from international society, conference, symposium, etc.
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IEEE GCCE2020 Excellent Student Award (On-demand)
2020.10 IEEE Numerical Analysis of Dispersion Characteristics of a Designed Photonic Crystal Fiber with a Plane Wave Expansion (PWE) Method
I. D. Barry, M. Yokota
Award type：Award from international society, conference, symposium, etc. Country：Japan
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電子情報通信学会アンテナ・伝播研究専門委員会功労賞
2017.6 電子情報通信学会アンテナ・伝播研究専門委員会
横田光広
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
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Certificate of Honour
2016.12 Department of Higher Education and Yangon Technological University
Mitsuhiro Yokota
Award type：Award from international society, conference, symposium, etc. Country：Myanmar
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平成22年度エレクトロニクスソサイエティ活動功労表彰
2011.3 電子情報通信学会
横田光広
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
Grant-in-Aid for Scientific Research 【 display / non-display 】
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２次元周期構造の特性解析とその電磁波素子設計への応用に関する研究
Grant number：23560072 2011.04 - 2014.03
科学研究費補助金 基盤研究(C)
Authorship：Principal investigator
２次元周期構造における反射・透過特性について、積分方程式を離散化したモーメント法により数値解析し、得られた結果を活用し電磁波素子設計への応用を目的としている。２次元周期構造を誘電体多層構造でモデル化する場合の適用範囲（周波数や物体の分布率など）を検証するため、先ず、２次元周期的構造に対する反射・透過特性についてモーメント法を用いて数値的に検討を行う。次に、モデル化で用いる有効誘電率の表現式について、有効性や適用範囲の検証を行う。さらに、電磁波素子を設計するための有用なデータ（例えば、反射・透過係数、近傍電磁界分布など）を数値的に検討する。具体的な電磁波素子として、周波数フィルタや偏波フィルタなどの電磁波フィルタを取り上げ、所望している特性を与える最適なパラメータ決めを行う。
Available Technology 【 display / non-display 】
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Home Page： 情報通信工学研究室
Related fields where technical consultation is available：・電波伝搬や光波デバイス設計
・電磁波分野の計算手法Message：電磁波を利活用したデバイスやシステムのシミュレーションに関する研究に取り組んでいます。関係する分野にご興味の方はご連絡ください。
