分层手征介质的光子带隙特性  

Photonic bandgap properties of stratified chiral media

作　　者：张援农[1] 赵正予[1] 黄天锡[1] 焦培南[2] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430079 [2]中国电波传播研究所,河南新乡453003

出　　处：《电波科学学报》2004年第5期537-542,共6页Chinese Journal of Radio Science

摘　　要：导出了分层手征介质中的斜入射电磁波的传输矩阵 ,由传输矩阵可以计算分层手征介质的反射和透射系数 ,研究了由手征介质构成的一维周期结构的光子带隙特性及其与入射角的变化关系 ,讨论了光子带隙与手征导纳之间的关系。研究表明 ,手征导纳可以控制光子带隙的特性 ,在适当的参数条件下 。The propagation of electromagnetic waves in stratified chiral structures is described by the 4×4 transfer-matrix method. Once 4×4 matrix that includes all information about the stratified chiral medium is known, both the reflection and transmission coefficients can be calculated from its matrix elements. The reflection and transmission coefficients of electromagnetic waves are studied as functions of the angle of the wave incidence onto the periodic structure. The photonic bandgap properties in chiral media are investigated. The relation between photonic bandgap and chirality admittance are analyzed. Chirality admittance can be used as a sensitive parameter to control photonic bandgap properties of one-dimensional layered periodical structures. Under proper operating parameters, quite perfect multi-channel filtering properties, corresponding to a chirality admittance of 2.5×10-2S, can be obtained with the periodic structure composed of alternating layers of two chiral media.

关 键 词：光子带隙 手征介质 传输矩阵 手征导纳 

分 类 号：TN011[电子电信—物理电子学]