Open AccessDesign of rectangular-groove fused-silica gratings as polarizing beam splitters
Author(s) -
Qunyu Bi,
Jiangjun Zheng,
Meizhi Sun,
Fuling Zhang,
Xinyu Xie,
Lin Zhang
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.011969
Subject(s) - optics , materials science , anti reflective coating , beam splitter , groove (engineering) , diffraction grating , diffraction , diffraction efficiency , wavelength , grating , refractive index , beam (structure) , optoelectronics , layer (electronics) , laser , physics , metallurgy , composite material
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.