Koji Hasegawa

ハセガワコウジ | Koji Hasegawa

Affiliation and department：
Job title： Professor

Research field (2)： Communication and network engineering , Electronic devices and equipment

Research keywords (3)： ultrasonics , electromagnetic waves, ultrasonics , electromagnetic waves

Papers (59)：

Yasuo Tsushima, Koji Hasegawa. Computing group velocities and group-velocity dispersions of optical fibers through automatic differentiation of explicit forms of propagation constants. Journal of Lightwave Technology. 2020
Shingo Sato, Koji Hasegawa, Naoya Mizukami, Yasuo Tsushima. Hybrid Trefftz Finite-Element Method for Analyzing the Eigenmodes of Optical Fibers. Journal of Lightwave Technology. 2019. 37. 3. 1029-1036
Shingo Sato, Koji Hasegawa, Yasuo Tsushima. Finding Propagation Constants of Leaky and Degenerate Modes Using Simultaneous Transcendental Equations of Holey Optical Fibers. JOURNAL OF LIGHTWAVE TECHNOLOGY. 2017. 35. 14. 2871-2879
Takashi Yasui, Koji Hasegawa, Koichi Hirayama. Resonant frequency analysis of a Lame-mode resonator on a quartz plate by the finite-difference time-domain method using the staggered grid with the collocated grid points of velocities. JAPANESE JOURNAL OF APPLIED PHYSICS. 2016. 55. 7
Takashi Yasui, Koji Hasegawa, Koichi Hirayama. Efficient finite-difference time-domain computation of resonant frequencies of rectangular Lamé mode resonators via a combination of the symmetry boundary conditions and the Padé approximation. Japanese Journal of Applied Physics. 2015. 54. 7. 07HD01-1 07HD04-6

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MISC (45)：

安井崇, 長谷川弘治, 平山浩一. 超音波デバイス SGCVを用いたFD-TD法による水晶ラメモード振動子の固有振動解析. 超音波techno. 2017. 29. 1. 80-83
Yasui Takashi, Hasegawa Koji, Hirayama Koichi. 3J2-1 Resonant Frequency Analysis of a Lame Mode Resonator on a Quartz Plate by the Finite-Difference Time-Domain Method with the Collocated Grid Points of Velocities. Proceedings of Symposium on Ultrasonic Electronics. 2015. 36. "3J2-1-1"-"3J2-1-2"
Wang Yousheng, Hasegawa Koji, Yasui Takashi. 2P2-12 Eigenmode Analysis of a Lamb Wave Isotropic Plate Waveguide by the Finite-Difference Time-Domain Method Using Staggered Grids with Collocated Grid Points of Velocities. Proceedings of Symposium on Ultrasonic Electronics. 2015. 36. "2P2-12-1"-"2P2-12-2"
A Study on Solvers for the Nonlinear Eigen-value Problem in the Multipole Method for Electromagnetic Waveguide Eigen-value Problems. 2015. 115. 144. 111-116
A Study on Solvers for the Nonlinear Eigen-value Problem in the Multipole Method for Electromagnetic Waveguide Eigen-value Problems. 2015. 115. 143. 111-116

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Association Membership(s) (5)：

the Japan society for computaional emgineering and science , Japan Society for Computational Methods in Engineering , The Institute of Electronics, Information and Communication Engineers , Optical society of America , IEEE

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