Design of wideband graded-index antireflection coatings at oblique light incidence

被引：5
作者：
Zhang Jun-Chao [1 ,2 ]
Fang Ming [1 ]
Jin Yun-Xia [1 ]
He Hong-Bo [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Key Lab Mat Sci & Technol High Power Lasers, Shanghai 201800, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
来源：
CHINESE PHYSICS B | 2012年 / 21卷 / 01期
基金：
中国国家自然科学基金;
关键词：
antireflection coatings; oblique incidence; graded-refractive-index profile; genetic algorithm; LOW-REFRACTIVE-INDEX; GENETIC ALGORITHM; REFLECTION;
D O I：
10.1088/1674-1056/21/1/014202
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We suggest a design method of graded-refractive-index (GRIN) antireflection (AR) coating for s-polarized or p-polarized light at off-normal incidence. The spectrum characteristic of the designed antireflection coating with a quintic effective refractive-index profile for a given state of polarization has been discussed. In addition, the genetic algorithm was used to optimize the refractive index profile of the GRIN antireflection for reducing the mean reflectance of s- and p-polarizations. The average reflectance loss was reduced to only 0.04% by applying optimized GRIN AR coatings onto BK7 glass over the wavelength range from 400 to 800 nm at the incident angle of theta(0) = 70 degrees.
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页数：5
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