用格林函数法研究衰逝波在二维负折射材料超透镜中的延迟现象

A Green’s function approach to study the delay time of evanescent wave in the Negative-Index-Material supperlen

摘要: 利用格林函数法,研究了衰逝波在二维负折射材料超透镜中的延迟现象,讨论了材料的电导率和光源频谱对衰逝波延迟时间的影响,并指出衰逝波的延迟能改善其时间相干性;为设计新型透镜,提高电磁场的时间相干性提供了一种新的思路。

Abstract: A time-dependent Green’s function was used approach to study the delay time of evanescent wave in the Negative-Index-Material superlen and we investigate the delay time of the evanescent wave would help to improve the temporal coherence of image.The conclusion is much of significance to the design of superlen optical devices.