二维椭圆柱长方晶格可控光子带隙研究  

Tunable Two-Dimensional Column Photonic Crystal with Rectangular Structure Via Manipulating Electromagnetically Induced Transparency Vapor

作　　者：叶军[1] 庄飞[1] 

机构地区：[1]杭州师范大学物理系,浙江杭州310036

出　　处：《杭州师范学院学报（自然科学版）》2007年第4期271-274,共4页Journal of Hangzhou Teachers College(Natural Science)

基　　金：浙江省自然科学基金项目(Y404355);浙江省教育厅配套项目(0424XP15);杭州师范大学研究生创新基金

摘　　要：从理论上研究了GaAs为背景介质,电磁感应透明(EIT)气体灌注的二维椭圆柱长方晶格光子晶体的光子带隙,发现在优化光子晶体几何参数的基础上,通过调控原子气体的自发辐射率、无辐射衰变率、控制光Rabi频率、原子数密度等外参数可以使高频区域的能带从完全光子带隙向零带隙转变.A two-dimensional photonic cystal with a rctangular lattice of elliptic air cylinders, which are filled with the EIT atomic vapor in the GaAs backgroud material, is designed. By manipulating the refractive index of the EIT vapor via the external control field, one can obtain the controllable bandgap structure that is sensitive to the variations of external conditions （e. g. the intensity of the control field）. It is shown that tunable bandgap in the high region of normalized frequency could be achieved by choosing the specific parameters such as the spontaneous activity rate, dephasing rate, Rabi frequency of controllable light, atomic number density as well as elliptic geometric parameters.

关 键 词：电磁感应透明 可控光子带隙 光子晶体 量子相干原子气体 

分 类 号：O737[理学—晶体学] O482.3