Numerical Evaluation of Polarization-Selective Characteristics of a Binary Relief Grating with Subwavelength Structures

Abstract

The finite-difference time-domain (FDTD) method is applied to the numerical evaluation of diffraction from a binary relief grating with subwavelength structures. It is demonstrated numerically that the binary relief grating made of isotropic materials works as a polarization selective optical device. It is further shown that the polarization effects depend on the arrangements of subwavelength structures.