Focusing Properties in Photonic Crystal Structure Formed by Air Holes in Dielectric Background with Concave Interface  

作　　者：翦知渐 彭景翠 周仁龙 

机构地区：[1]Department of Applied Physics, Hunan University, Changsha 410082 [2]National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083

出　　处：《Chinese Physics Letters》2006年第12期3359-3362,共4页中国物理快报（英文版）

摘　　要：We investigate the focusing properties of photonic crystal structures with a concavo-concave as the photonic crystal boundary. The photonic crystal is constituted by air holes parallelly distributed in a uniform dielectric. A good-quality focus of a plane wave can appear out of the photonic crystal structure, and a strong far field focus is also formed from the photonic crystal interface. A negative-refractive beam at the frequency 0.195 （2πc/α） for the excited Bloch wave mode near the Brillouin zone edges under all incident angles are obtained by simulation.We investigate the focusing properties of photonic crystal structures with a concavo-concave as the photonic crystal boundary. The photonic crystal is constituted by air holes parallelly distributed in a uniform dielectric. A good-quality focus of a plane wave can appear out of the photonic crystal structure, and a strong far field focus is also formed from the photonic crystal interface. A negative-refractive beam at the frequency 0.195 （2πc/α） for the excited Bloch wave mode near the Brillouin zone edges under all incident angles are obtained by simulation.

关 键 词：NEGATIVE REFRACTION INDEX LENS SLAB RADIATION 

分 类 号：O734[理学—晶体学]