Design and optimization of broadband wide-angle antireflection structures for binary diffractive optics

被引：7

作者：

Chang, Chih-Hao ^{[1
,2
]}

Waller, Laura ^{[3
]}

Barbastathis, George ^{[1
,2
]}

机构：

[1] SMART Ctr, Singapore, Singapore

[2] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

[3] MIT, Dept Comp Sci & Elect Engn, Cambridge, MA 02139 USA

来源：

OPTICS LETTERS | 2010年 / 35卷 / 07期

基金：

新加坡国家研究基金会;

关键词：

COUPLED-WAVE ANALYSIS; GRATINGS; IMPLEMENTATION; INDEX;

D O I：

10.1364/OL.35.000907

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose a class of antireflecting structures that can effectively suppress reflections for binary diffractive optics. In this structure, multiple periodic thin films with gradually varying refractive indices are used to shift all reflected diffraction to the transmitted orders. The structure is optimized to operate over broad bands and wide angles using rigorous coupled-wave analysis and genetic algorithms. We validated the structure numerically using finite-difference time-domain methods. The proposed structure may lead to more efficient diffractive devices for applications in thin-film photovoltaic, waveguide coupler, and holographic optical elements. (C) 2010 Optical Society of America

引用

页码：907 / 909

页数：3

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