Two-square target detection and imaging using NR-PC flat lens

被引：0
|
作者：
Xu, Yang [1 ]
Lian, Yingfei [2 ]
Shen, Tinggen [1 ,2 ]
Meng, Wenjuan [1 ]
Wang, Feifei [2 ]
Li, Zhenghua [3 ]
Yuan, Baoguo [2 ]
Huang, Ming [1 ]
Wang, Gang [1 ]
机构：
[1] Jiangsu Univ, Dept Telecommun Engn, Zhenjiang 212013, Peoples R China
[2] Jiangsu Univ, Inst Appl Phys, Zhenjiang 212013, Peoples R China
[3] Zhenjiang Watercraft Coll, Commun T&R Sect, Zhenjiang 212013, Peoples R China
来源：
OPTICAL AND QUANTUM ELECTRONICS | 2011年 / 42卷 / 6-7期
关键词：
Negative effective index; Minimum distinguishable distance; Two-target dynamic scanning; NEGATIVE REFRACTION; PHOTONIC CRYSTALS; INDEX; VERIFICATION;
D O I：
10.1007/s11082-011-9466-7
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The characteristics of two-target detection and imaging from negative-refraction photonic crystal (NR-PC) flat lens are studied by using the two-dimensional finite-difference time-domain method. It is demonstrated that due to the influence of the mini-forbidden band and resonance excitation effect, high transmissivity will appear at the normalized resonance frequency of 0.3068 when the lightwave goes through the NR-PC lens. Meanwhile, the use of the NR-PC lens may introduce at least fourfold improvement of the refocusing resolution, if compared to the directly backscattered lightwave without using the NR-PC lens. In addition, by giving a defination for two-target minimum distinguishable distance, we further investigate the performance of two-target detection and imaging system using the proposed focus-scanning scheme. The results show that the smaller the size of the target pair is, the weeker the interference between the two targets will be, which results in a better performance in the minimum distinguishable distance.
引用
收藏
页码：347 / 357
页数：11
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