Study of broadband polarization conversion with metallic surface-relief gratings by rigorous coupled-wave analysis.
The conical rigorous coupled-wave analysis (RCWA) is employed to calculate the polarization conversion through the excitation of surface plasmons on metallic gratings. Various examples are examined with this numerical scheme. Our calculated results are consistent with those obtained from experiment and from other numerical methods. Three types of subwavelength surface-relief gratings are studied for the capability of broadband polarization conversion in the visible region. For wide-angle applications, various incident angles are studied and high polarization conversion efficiency is achieved.
College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, USA. tsaicc@creol.ucf.edu
Chang-Ching
CC
Tsai
Shin-Tson
ST
Wu