Engineering the near-field imaging of a rectangular-lattice photonic-crystal slab in the second band  

作　　者：FENG Shuai AO Ling WANG YiQuan 

机构地区：[1]College of science,Central University for Nationalities,Beijing 100081,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2009年第1期87-91,共5页中国科学：物理学、力学、天文学（英文版）

基　　金：Supported by the Research Foundation of the State Ethnic Affairs Commission of China (Grant No.07ZY15);the National Key Basic Research Special Foundation of China (Grant Nos.2004CB719804 and 2006CB921702);the National Natural Science Foundation of China (Grant Nos.10674185 and 10705056);the Youth Foundation of Central University of Nationalities (Grant No.CUN0207)

摘　　要：Imaging properties of a two-dimensional rectangular-lattice photonic crystal (PC) slab consisting of air holes immersed in a dielectric are studied in this work. The field patterns of electromagnetic waves radiated from a point source through the PC slab are calculated with the finite-difference time-domain method. Comparing the field patterns with the corresponding equifrequency-surface contours simulated by the plane-wave expansion method, we find that an excellent-quality near-field image may be formed through the PC slab by the mechanisms of the simultaneous action of the self-collimation effect and the negative-refraction effect. Near-field imaging may be obtained within two different frequency regions in two vertical directions of the PC slab.Imaging properties of a two-dimensional rectangular-lattice photonic crystal (PC) slab consisting of air holes immersed in a dielectric are studied in this work. The field patterns of electromagnetic waves radiated from a point source through the PC slab are calculated with the finite-difference time-domain method. Comparing the field patterns with the corresponding equifrequency-surface contours simulated by the plane-wave expansion method, we find that an excellent-quality near-field image may be formed through the PC slab by the mechanisms of the simultaneous action of the self-collimation effect and the negative-refraction effect. Near-field imaging may be obtained within two different frequency regions in two vertical directions of the PC slab.

关 键 词：PHOTONIC crystal negative REFRACTION SUBWAVELENGTH imaging 

分 类 号：O734[理学—晶体学]