Takashi YASUI


Efficient Analysis of Diffraction Grating with 10000 Random Grooves by Difference-Field Boundary Element Method
Jun-ichiro SUGISAKA Takashi YASUI Koichi HIRAYAMA 
Publication:   
Publication Date: 2017/01/01
Vol. E100-C  No. 1  pp. 27-36
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Electromagnetic Theory and Its Application)
Category: 
Keyword: 
diffraction gratingrandom structurenumerical methodintegral equationboundary element method
 Summary | Full Text:PDF(754.2KB)

Efficient Scattering Analysis of Arbitrarily Shaped Local Defect in Diffraction Grating
Jun-ichiro SUGISAKA Takashi YASUI Koichi HIRAYAMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/01/01
Vol. E99-C  No. 1  pp. 76-80
Type of Manuscript:  BRIEF PAPER
Category: 
Keyword: 
diffraction gratingboundary-element methoddefectscatteringnumerical analysis
 Summary | Full Text:PDF(735.5KB)

A Study on Optimization of Waveguide Dispersion Property Using Function Expansion Based Topology Optimization Method
Hiroyuki GOTO Yasuhide TSUJI Takashi YASUI Koichi HIRAYAMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/07/01
Vol. E97-C  No. 7  pp. 670-676
Type of Manuscript:  Special Section PAPER (Special Section on Recent Advances in Simulation Techniques and Their Applications for Electronics)
Category: 
Keyword: 
function expansion methodtopology optimizationphotonic crystal waveguideslow-lightstructural filter
 Summary | Full Text:PDF(2.8MB)

Synthesis of 1-Input 3-Output Lattice-Form Optical Delay-Line Circuit
Shafiul AZAM Takashi YASUI Kaname JINGUJI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/01/01
Vol. E90-C  No. 1  pp. 149-156
Type of Manuscript:  PAPER
Category: Optoelectronics
Keyword: 
optical delay-line circuitoptical filterFIRdirectional couplerphase shifter
 Summary | Full Text:PDF(1.2MB)

Three-Dimensional Beam Propagation Analysis of Quasi-Phase Matched Second Harmonic Generation Devices with Triangular and Semi-Circular Domain Inversion Profiles
Takashi YASUI Masanori KOSHIBA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2000/05/25
Vol. E83-C  No. 5  pp. 697-704
Type of Manuscript:  INVITED PAPER (Special Issue on Recent Developments in Guided-Wave Problems)
Category: 
Keyword: 
finite element methodbeam propagation methodnonlinear waveguidesecond harmonic generationquasi-phase matching
 Summary | Full Text:PDF(1013.4KB)