Design of rectangular-groove fused-silica gratings as polarizing beam splitters.
The application of rectangular-groove fused-silica gratings as polarizing beam splitters (PBSs) under Littrow incidence is investigated. Based on the simple modal method, two different cases of PBS gratings are designed. The achieved solutions, which are independent on the incident wavelength, are verified by the rigorous coupled-wave analysis and expressed in several polynomials instead of listing one or two numerical solutions. More importantly, on the basis of the designed PBS gratings, a porous fused silica antireflective film is introduced to improve their performances. Theoretical results indicate that such modified rectangular-groove PBS gratings exhibit higher diffraction efficiencies (over 0.99) and larger spectral bandwidths.
Bi
Qunyu
Q
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai 201800, China. luoxuele@gmail.com
Zheng
Jiangjun
J
Sun
Meizhi
M
Zhang
Fuling
F
Xie
Xinglong
X
Lin
Zunqi
Z
D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D012031:Refractometry / Q000295:instrumentation*; D012822:Silicon Dioxide / Q000737:chemistry*
D012822:Silicon Dioxide