Curvilinear triangular-prism element for computation of band structure in photonic crystal slab. - Koichi Hirayama; Masatoshi Kanou; Yasuhide Tsuji; Masanori Koshiba (IEICE Electron. Express, 2006)

Application of Topology Optimization to H-Plane Waveguide Component. - Koichi Hirayama; Yasuhide Tsuji; Tsuyoshi Nomura; Kazuo Sato; Shinji Nishiwaki (IEICE Trans. Electron., 2007)

Design Optimization of H-Plane Waveguide Component by Level Set Method. - Koichi Hirayama; Yasuhide Tsuji; Shintaro Yamasaki; Shinji Nishiwaki (IEICE Trans. Electron., 2011)

A Study on Optimization of Waveguide Dispersion Property Using Function Expansion Based Topology Optimization Method. - Hiroyuki Goto; Yasuhide Tsuji; Takashi Yasui; Koichi Hirayama (IEICE Trans. Electron., 2014)

Efficient Scattering Analysis of Arbitrarily Shaped Local Defect in Diffraction Grating. - Jun-ichiro Sugisaka; Takashi Yasui; Koichi Hirayama (IEICE Trans. Electron., 2016)

Efficient Analysis of Diffraction Grating with 10000 Random Grooves by Difference-Field Boundary Element Method. - Jun-ichiro Sugisaka; Takashi Yasui; Koichi Hirayama (IEICE Trans. Electron., 2017)

Topology optimal design for optical waveguides using time domain beam propagation method. - Akito Iguchi; Yasuhide Tsuji; Takashi Yasui; Koichi Hirayama (IEICE Electron. Express, 2018)

Design of Compact Long-Wavelength-Pass Filter in Metal-Dielectric-Metal Plasmonic Waveguide with Stubs Using Transmission Line Model. - Koichi Hirayama; Jun-ichiro Sugisaka; Takashi Yasui (IEICE Trans. Electron., 2020)

Foreword. - Akira Hirose 001; Koichi Hirayama (IEICE Trans. Electron., 2020)

Reconstruction of Scatterer Shape from Relative Intensity of Scattered Field by Using Linearized Boundary Element Method. - Jun-ichiro Sugisaka; Takashi Yasui; Koichi Hirayama (IEICE Trans. Electron., 2020)

Foreword. - Koichi Hirayama; Hiroyuki Deguchi 001 (IEICE Trans. Electron., 2021)

Single-Mode Condition of Chalcogenide Glass Channel Waveguides for Integrated Optical Devices Operated across the Astronomical N-Band. - Takashi Yasui; Jun-ichiro Sugisaka; Koichi Hirayama (IEICE Trans. Electron., 2021)

Permittivity Measurement Method for Thin Sheets Using Split-Cylinder Resonator With Protrusions. - Koichi Hirayama; Yoshiyuki Yanagimoto; Jun-ichiro Sugisaka; Takashi Yasui (IEEE Trans. Instrum. Meas., 2022)

Bending Loss Analysis of Chalcogenide Glass Channel Waveguides for Mid-Infrared Astrophotonic Devices. - Takashi Yasui; Jun-ichiro Sugisaka; Koichi Hirayama (IEICE Trans. Electron., 2023)

Permittivity Estimation Based on Transmission Coefficient for Gaussian Beam in Free-Space Method. - Koichi Hirayama; Yoshiyuki Yanagimoto; Jun-ichiro Sugisaka; Takashi Yasui (IEICE Trans. Electron., 2023)