The application of dynamic scanning in target detection and imaging based on an NR-PC flat lens

作     者：MENG WenJuan CAO Hui SHEN TingGen WANG FeiFei LI ZhengHua YUAN BaoGuo HUANG Ming LIAN YingFei 

作者机构：Department of Telecommunication Engineering Jiangsu University Zhenjiang 212013 China Institute of Applied Physics Jiangsu University Zhenjiang 212013 China Communication T&R Section Zhenjiang Watercraft College Zhenjiang 212013 China 

出 版 物：《Chinese Science Bulletin》 (Chinese Science Bulletin)

年 卷 期：2011年第56卷第8期

页      面：830-834页

核心收录：

学科分类：08[工学] 080203[工学-机械设计及理论] 0802[工学-机械工程] 

基　　金：supported by 2010 Jiangsu University Hundred Undergraduate Innovation Project (2010073) 

主　　题：成像分辨率 动态目标检测 动态扫描 应用程序 PC 星期 平面镜 共振频率 

摘      要：In this paper a finite-difference time-domain method is used to model and analyze the application of dynamic scanning in target detection and imaging by using an effective negative-refraction photonic crystal(NR-PC) flat lens.The results show that there is a transmission peak,with a value far greater than unity,resulting from the influence of mini-forbidden bands and resonance excitation effect at a resonance frequency of 0.3068(a/λ).Thus,the lightwave emitted from the point source will provide strong backscattered waves after being focused on the target by the NR-PC lens that greatly improves the refocusing resolution and imaging resolution of the backscattered wave.Furthermore,a comparison with a non-dynamic scanning scheme clearly demonstrates that the dynamic scanning scheme provides improved refocusing resolution.In conclusion,our investigation optimized the performance of a detection and imaging system,and provided the basis for converting an idealized LHM lens into a physically realizable NR-PC flat lens.