Broad Band Focusing of Photonic Crystals with Graded Negative Index

被引：2
|
作者：
Zhu, Qingyi [1 ,3 ]
Fu, Yongqi [1 ]
Zhu, Shaoli [2 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Phys Elect, Chengdu 610054, Sichuan Provinc, Peoples R China
[2] Univ Queensland, Australian Inst Bioengn & Nanotechnol, Brisbane, Qld 4072, Australia
[3] Sichuan Informat Technol Coll, Dept Elect Engn, Guangyuan 628017, Sichuan Provinc, Peoples R China
来源：
JOURNAL OF COMPUTATIONAL AND THEORETICAL NANOSCIENCE | 2013年 / 10卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Photonic Crystal; Negative Refraction; Focusing; REFRACTION; LENS;
D O I：
10.1166/jctn.2013.2675
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this paper, we designed a hexagonal lattice photonic crystal (PC) which presents negative refraction behavior in the visible region. By varying the PC parameters, a graded index PC was obtained and used to focus a plane wave. Numerical calculation was adopted to demonstrate the negative refraction and focusing effect. Our calculation results demonstrated that the PC can realize focusing by negative refraction in visible region. Moreover, a broad band focusing ranging from 425 nm to 700 nm was observed with less chromatic aberration in the PC structure. The proposed structures provide an approach for designing the negative index imaging systems.
引用
收藏
页码：177 / 180
页数：4
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