arXiv subjects

Tatsuya Usuki

Publications and source records attributed to Tatsuya Usuki.

2 recordsLinked to original sources

arXiv2021

Wave scattering in frequency domain

This report shows formulation of wave scattering in frequency domain. The formulation provides an understanding of S-matrix solver which is named as Scattering Matrix Analyzer (SMatrAn). The S-matrix has the whole of amplitude and phase information for reflected and transmitted waves from a complicated scatterer. Accurate S-matrix leads to quantitative evaluation of scattering wave. We can understand all formulas for the SMatrAn after reading this report. The S-matrix provided by SMatrAn will give us detailed analysis on complicated scattering in optical structure.

physics.comp-ph↗

arXiv2013

Numerical formulation of three-dimensional scattering problems for optical structures

This paper describes a numerical formulation for calculating wave propagation with high precision in a three-dimensional system. Yee's discretization scheme is used to formulate a frequency domain method that is compatible with the finite-difference time-domain (FDTD) procedure. When the S-matrix satisfies a unitarity (power flow conservation) condition, the method enables arbitrary S-matrix elements to be obtained within a numerical error of less than $10^{-8}$ ($2 \times 10^{-13}$) for double precision format.

physics.comp-ph↗