基于导模共振光栅的广角透射滤光片。

Wide-angle transmissive filter based on a guided-mode resonant grating.

作者信息

Ye Yan, Shao Renjin, Zhou Yun, Chen Linsen

机构信息

Institute of Information Optical Engineering, Soochow University, Suzhou 215006, China.

出版信息

Appl Opt. 2012 Aug 20;51(24):5785-90. doi: 10.1364/AO.51.005785.

DOI:10.1364/AO.51.005785

PMID:22907004

Abstract

A wide-angle color filter for TE-polarization is proposed based on a guided-mode resonant grating selectively coated with a metal film. The effects of the structure parameters to the resonant transmission characteristics are discussed by the rigorous coupled-wave analysis. Its optimal structure was given for a green color filter with a peak transmission of 77.6%, a full width at half-maximum (FWHM) of ~120 nm, and a good angular tolerance up to ±40°. Compared to the similar structure with a nonresonant dielectric grating, it decreases the FWHM effectively for the resonance induced by the guided-mode resonant grating. The numerical results indicate that the designed structure has a good wide-angle transmission performance.

摘要

提出了一种基于选择性镀有金属膜的导模共振光栅的TE偏振广角滤色器。通过严格耦合波分析讨论了结构参数对共振传输特性的影响。给出了用于绿色滤色器的最佳结构，其峰值透过率为77.6%，半高宽（FWHM）约为120nm，在±40°范围内具有良好的角度容差。与具有非共振介质光栅的类似结构相比，它有效地减小了导模共振光栅引起的共振的半高宽。数值结果表明，所设计的结构具有良好的广角传输性能。