Research on light-wave target detection and imaging by using NR-PC flat lens with active impurities

被引：0

作者：

Wang, F. ^{[1
]}

Sun, J. ^{[2
]}

Shen, T. ^{[1
]}

Xu, Y. ^{[3
]}

Meng, W. ^{[3
]}

Li, Z. ^{[4
]}

Yuan, B. ^{[1
]}

机构：

[1] Jiangsu Univ, Inst Appl Phys, Zhenjiang 212013, Peoples R China

[2] Power Supply Co Wuhu, Dept Commun, Wuhu 241320, Peoples R China

[3] Jiangsu Univ, Dept Telecommun Engn, Zhenjiang 212013, Peoples R China

[4] Zhenjiang Watercraft Coll, Commun T&R Sect, Zhenjiang 212013, Peoples R China

来源：

IET OPTOELECTRONICS | 2012年 / 6卷 / 03期

关键词：

NEGATIVE REFRACTIVE-INDEX; LEFT-HANDED MATERIALS; PHOTONIC CRYSTALS; SLAB;

D O I：

10.1049/iet-opt.2011.0079

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 authors mainly use the two-dimensional finite-difference time-domain method to study the effection on image resolution of target detection and imaging when active impurities are introduced to negative refraction photonic crystals (NR-PC) flat lens. It is demonstrated that because of the influence of the mini-forbidden band and resonance excitation effect, high transmissivity will appear at the resonance frequency of 0.3068(a/lambda) when the light wave goes through the NP-PC lens. Also, the results show that the refocused wave backscattered from a target is significantly stronger than the directly backscattered wave when no NR-PC flat lens is applied. Further studies demonstrated that the introduction of active impurities into NR-PC lens provides improved refocusing and image resolution. In conclusion, the authors' investigation optimises the performance of the focus-scanning scheme, and provides the basis for converting an idealised left-handed materials (LHM) lens into a physically realisable NR-PC flat lens.

引用

页码：121 / 126

页数：6