Zheng Gaige, Cong Jiawei, Xu Linhua, Su Wei
Opt Lett. 2014 Oct 15;39(20):5929-32. doi: 10.1364/OL.39.005929.
We demonstrate the design of an efficient angle-insensitive guided mode resonance filter (GMRF), with narrow bandwidth and low sideband reflection, for TE-polarized waves. The reflection properties of the multilayer structure have been studied, and the results verify that the thin film design of the gradient-index layer is important for the realization of an angle-insensitive filter. Various gradient coefficients of the thin film have distinct effects on the reflection spectrum. For an increasing incident angle, although the line-shape symmetry becomes less perfect, the positions of the resonant peak remain the same. The GMRF proposed here has many desirable attributes that lends itself to being an excellent platform, for devices such as lasers, detectors, filters, and sensors.
我们展示了一种用于TE偏振波的高效角度不敏感导模共振滤波器（GMRF）的设计，该滤波器具有窄带宽和低边带反射特性。研究了多层结构的反射特性，结果证实渐变折射率层的薄膜设计对于实现角度不敏感滤波器很重要。薄膜的各种渐变系数对反射光谱有不同影响。对于入射角增大的情况，尽管线形对称性变得不那么完美，但共振峰的位置保持不变。这里提出的GMRF具有许多理想特性，使其成为激光、探测器、滤波器和传感器等器件的优秀平台。
