The Absorbing Properties of Two-Dimensional Plasma Photonic Crystals  

作　　者：亓丽梅 李超 方广有 高翔 

机构地区：[1]Key Laboratory of Electromagnetic Radiation and Sensing Technology,Institute of Electronics,Chinese Academy of Sciences

出　　处：《Plasma Science and Technology》2015年第1期4-9,共6页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.61107030,11174280,60990323 and 60990320);the Promotive Research Fund for Excellent Young and Middle-aged Scientists of Shandong Province(No.BS2010CL025);the China Postdoctoral Science Foundation

摘　　要：Plasma photonic crystals composed of periodic plasma and dielectric materials have attracted considerable attention because of their tunable photonic band gaps,but only their band structures or negative refractive index properties have been addressed in previous works.In this paper,through studying the transmission and reflection characteristics of two types of twodimensional plasma photonic crystals,it is found that plasma photonic crystals play an important role in absorbing waves,and they show broader band and higher amplitude absorption characteristics than bulk plasmas.Also,the absorption of plasma photonic crystals can be tuned via plasma parameters;varying the collision frequency can make the bandwidth and amplitude tunable,but cannot change the central frequency,whereas varying the plasma frequency would control both the location and the amplitude of the absorbers.These features of plasma photonic crystals have potential for terahertz tunable absorber applications.Plasma photonic crystals composed of periodic plasma and dielectric materials have attracted considerable attention because of their tunable photonic band gaps,but only their band structures or negative refractive index properties have been addressed in previous works.In this paper,through studying the transmission and reflection characteristics of two types of twodimensional plasma photonic crystals,it is found that plasma photonic crystals play an important role in absorbing waves,and they show broader band and higher amplitude absorption characteristics than bulk plasmas.Also,the absorption of plasma photonic crystals can be tuned via plasma parameters;varying the collision frequency can make the bandwidth and amplitude tunable,but cannot change the central frequency,whereas varying the plasma frequency would control both the location and the amplitude of the absorbers.These features of plasma photonic crystals have potential for terahertz tunable absorber applications.

关 键 词：plasma photonic crystal absorber tunable plasma frequency collision frequency 

分 类 号：O572.31[理学—粒子物理与原子核物理]