Real-Time Angular Sensitivity Compensation of Guided-Mode Resonance Filter

Author

Banglian Xu ; Dawei Zhang ; Yuanshen Huang ; Qi Wang ; Baicheng Li ; Daohua Zhang

Author_Institution

Dept. of Eng., Univ. of Shanghai for Sci. & Technol., Shanghai, China

Volume

26

Issue

3

fYear

2014

fDate

Feb.1, 2014

Firstpage

231

Lastpage

234

Abstract

Guided-mode resonant filters (GMRFs) are promising narrowband filters with high peak efficiency, but their practical applications have been restricted by their natural high angular sensitivity. We investigated the influence of incident angle and azimuthal angle on the spectral response of GMRF, and found that the resonant peaks are mainly influenced by the incident angle. A polymer-dispersed liquid crystal layer was introduced to compensate the shift of resonant wavelength through applying proper voltage in real time, and numerical results show that a large angular compensation range of about ±4.2° can be obtained while maintaining high performance of the spectral response.

Keywords

diffraction gratings; optical filters; optical materials; optical resonators; polymer dispersed liquid crystals; GMRF spectral response; azimuthal angle; guided-mode resonance filter; incident angle; narrowband filters; polymer-dispersed liquid crystal layer; real-time angular sensitivity compensation; resonant wavelength shift compensation; voltage; Bandwidth; Gratings; Indium tin oxide; Optical filters; Optimized production technology; Reflectivity; Refractive index; Subwavelength structures; diffraction gratings; filters; guided-mode resonant; real-time angular sensitivity compensation;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2013.2290734

Filename

6664985