Open AccessAngular-dependent polarization-insensitive filter fashioned with zero-contrast grating
Author(s) -
Xumin Gao,
Tong Wu,
Yin Xu,
Xin Li,
Dan Bai,
Gangyi Zhu,
Hongbo Zhu,
Yongjin Wang
Publication year - 2015
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.015235
Subject(s) - optics , grating , polarization (electrochemistry) , polarizing filter , materials science , diffraction grating , linear polarization , optical filter , physics , laser , chemistry
We report here an angular-dependent polarization-insensitive filter fashioned with a free-standing zero-contrast grating (ZCG), which is implemented on an HfO(2)/Silicon platform. The spectral characteristics are investigated by rigorous coupled-wave analysis method and measured on angular-resolved micro-reflectance system. The proposed ZCG structure experimentally shows that the polarization-insensitive resonances occur at 595nm for the incidence angle θ of 12.8° and 500nm for the incidence angle θ of 14.2°. When the incident light is normal to the grating surface, the ZCG device generates yellow and red colors for p- and s-polarization, respectively. The experimental results are in good agreement with the simulations, which indicate that the free-standing ZCG device is promising for polarization-insensitive filter and polarization-controlled tunable color filter.