Design and optimization of space-variant photonic crystal filters

被引：8
|
作者：
Rumpf, Raymond C.
Mehta, Alok
Srinivasan, Pradeep
Johnson, Eric G. [1 ]
机构：
[1] Prime Res, Blacksburg, VA 24060 USA
[2] Univ Cent Florida, Coll Opt & Photon, Orlando, FL 32816 USA
[3] Univ N Carolina, Ctr Optoelect & Opt Commun, Charlotte, NC 28223 USA
来源：
APPLIED OPTICS | 2007年 / 46卷 / 23期
关键词：
D O I：
10.1364/AO.46.005755
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A space-variant photonic crystal filter is designed and optimized that may be placed over a detector array to perform filtering functions tuned for each pixel. The photonic crystal is formed by etching arrays of holes through a multilayer stack of alternating high and low refractive index materials. Position of a narrow transmission notch within a wide reflection band is varied across the device aperture by adjusting the diameter of the holes. Numerical simulations are used to design and optimize the geometry of the photonic crystal. As a result of physics inherent in the etching process, the diameter of the holes reduces with depth, producing a taper. Optical performance was found to be sensitive to the taper, but a method for compensation was developed where film thickness is varied through the device. (c) 2007 Optical Society of America.
引用
收藏
页码：5755 / 5761
页数：7
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