Analysis of the polarization-dependent diffraction from a metallic grating by use of a three-dimensional combined vectorial method.
A three-dimensional combined vectorial method, which is based on the finite-difference time-domain algorithm and vectorial diffraction formulation, is introduced to analyze the interaction of a realistic focused beam with a metallic grating in an optical storage system. The diffracted field patterns and the detected signals are calculated for gratings with different geometries, and the polarization-dependent characteristics are studied. The combined method can give accurately the detected signals and the field pattern at any desired position of the optical storage system.
Centre for Optical and Electromagnetic Research, Joint Research Center of Photonics of the Royal Institute of Technology (Sweden) and State Key Laboratory for Modern Optical Instrumentation, Zhejiang University, Yu-Quan, Hangzhou, 310027, China.
Liu
L
Liu
Zhimin
Z
Shi
Sailing
S
He