Guided-mode resonant grating filter with an antireflection structured surface

被引:23
作者
Mizutani, A
Kikuta, H
Iwata, K
Toyota, H
机构
[1] Osaka Prefecture Univ, Coll Engn, Sakai, Osaka 5998531, Japan
[2] Osaka Sci & Technol Ctr, Osaka 5941157, Japan
关键词
D O I
10.1364/JOSAA.19.001346
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We describe a new structure of guided-mode resonant grating (GMRG) filters with low sideband reflectance. This GMRG filter consists of a high-index thin film on an antireflective structured surface called "moth-eye structure." Since the high-index film undulates along the surface structure, the film acts as a modulated optical waveguide. An incident light wave satisfying a resonant condition is reflected by the GMRG filter, and nonresonant light waves pass through the filter. This GMRG filter is valid for reducing reflection of nonresonant light waves in a wide spectral range. The resonant reflection of this new filter was investigated by numerical calculation based on an electromagnetic grating analysis. In the case of a triangular antireflective surface structure whose thickness is 2x greater than its period, the sideband reflectance for nonresonant light waves was lower than 0.5% for TM-polarized light in a wide range of wavelengths. (C) 2002 Optical Society of America.
引用
收藏
页码:1346 / 1351
页数:6
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