Focusing effect of a graded index photonic crystal lens

被引：19
|
作者：
Tan, C. [1 ]
Niemi, Tapio [1 ]
Peng, Changsi [2 ]
Pessa, Markus [1 ]
机构：
[1] Tampere Univ Technol, Optoelect Res Ctr, Tampere 33720, Finland
[2] Soochow Univ, Inst Informat Opt Engn, Suzhou 215006, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2011年 / 284卷 / 12期
基金：
芬兰科学院;
关键词：
D O I：
10.1016/j.optcom.2011.02.067
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a new graded-index photonic crystal (GRIN PhC) structure which can be made by laser interference lithography (LIL). It can be applied as miniaturized focusing lens. Numerical simulations are carried out on the structures with different widths, lengths, and modulations. In the qualitative analysis of the focal length, focusing of a GRIN PhC was proved to originate from both the graded sizes of the rods and multimode interference. Multimode interference dominates the focusing effect when a GRIN PhC has a small length or a small difference in the rod sizes. Intensity distributions in different cases were given to support the conclusion. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：3140 / 3143
页数：4
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