%0 Journal Article
%T Near-field imaging of a square-lattice metallic photonic-crystal slab at the second band
%A Feng Shuai
%A Feng Zhi-Fang
%A Ren Kun
%A Ren Cheng
%A Li Zhi-Yuan
%A Cheng Bing-Ying
%A Zhang Dao-Zhong
%A <br>冯帅
%A 冯志芳
%A 任坤
%A 任承
%A 李志远
%A 程丙英
%A 张道中
%J 中国物理 B
%D 2006
%I 
%X Imaging properties of a two-dimensional photonic crystal slab lens are investigated through the finite-difference time-domain method. In this paper, we consider the photonic crystal slab consisting of a square lattice of square metallic rods immersed in a dielectric background. Through the analysis of the equifrequency-surface contours and the field patterns of a point source placed in the vicinity of the photonic crystal slab, we find that a good-quality image can form at the frequencies in the second TM-polarized photonic band. Comparing the images formed at different frequencies, we can clearly see that an excellent-quality image is formed by the mechanisms of simultaneous action of the self-collimation effect and the negative-refraction effect.
%K negative refraction
%K photonic crystal<br>近场成像
%K 正方晶格金属性光子晶体板
%K 负折射
%K 有限差分时域法
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=37AA3F75F55F27F878FC4C94688123EE&yid=37904DC365DD7266&vid=23CCDDCD68FFCC2F&iid=38B194292C032A66&sid=385E3C2062167B88&eid=AF4A4411BB448A36&journal_id=1009-1963&journal_name=中国物理&referenced_num=1&reference_num=20