一维Al／SrF2低温超导体-电介质光子晶体能带结构  

The photonic band structure of one-dimensional Al/SrF_2 low temperature superconductor-dielectric photonic crystal

作　　者：李建锋[1] 王建[1] 周峰[2] 王成伟[1,2] 

机构地区：[1]西北师范大学物理与电子工程学院,甘肃省原子分子物理与功能材料重点实验室,兰州730070 [2]中国科学院兰州化学物理研究所固体润滑国家重点实验室,兰州730000

出　　处：《低温与超导》2011年第9期24-29,共6页Cryogenics and Superconductivity

基　　金：国家自然科学基金资助项目(10974155,10774121,20973188);甘肃省高分子材料重点实验室开放基金项目(KF-09-02);甘肃省高等学校研究生导师科研项目(0801209)资助

摘　　要：基于二流体电子模型和平面波展开法,计算了一维A l/SrF2超导体-电介质光子晶体的能带结构。结果表明:随着超导层厚度的增加,第一光子带隙中心频率和截止频率均发生蓝移,且第一带隙宽度逐渐增加到一个峰值后又逐渐变窄。更重要的是,在低于临界温度的超低温环境中,温度的微小变化,对该类光子晶体的带隙宽度、中心频率以及截止频率均有明显的调制作用。The photonic band structure of one -dimensional （1 D） AL/SrF2 low temperature superconductor -dielectric photonic crystal （ PC ） was calculated numerically based on the plane - wave expansion method. The two - fluid model was adopted to describe the dielectric properties of the low temperature superconducting system. The simulation results clearly reveal both photonic band gap and a cutoff frequency can be modulated through the thicknesses of the superconductor layers. It is more interesting that with a small variation of ambient temperature, the photonic band gap and a cutoff frequency can be obviously modulated. This work would be of value in the design of photoelectric device for potential applications in extreme low - temperature environment.

关 键 词：超导体 光子晶体 带隙 二流体模型 平面波展开法 

分 类 号：O734[理学—晶体学]