垂直入射空变等离子体光子晶体带隙特性研究  

Band-gap characters of space-varying plasma photonic crystals in normal incidence

作　　者：杨利霞[1] 陈伟[1] 孔娃[1] 施卫东[2] 于萍萍[1] 

机构地区：[1]江苏大学通信工程系,江苏镇江212013 [2]江苏大学流体机械工程技术研究中心,江苏镇江212013

出　　处：《电波科学学报》2013年第1期105-110,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金面上项目(61072002);教育部高等学校博士点科研基金项目(20093227120018);江苏省第八批次"六大人才高峰"计划(2011-DZXX-031);江苏省博士后基金项目(1201001A)资助的

摘　　要：采用改进的磁化等离子体电磁散射的时域有限差分(FDTD)算法,分别研究了一维空变磁化和非磁化等离子体光子晶体(PPC)的禁带特性.以微分高斯脉冲为激励源,计算了等离子体光子晶体的反射系数和透射系数.讨论了在垂直入射情况下等离子体频率随空间呈脉冲形式变化的周期函数对禁带的影响.结果表明:通过改变等离子体频率在空间的不同变化可以实现对禁带的控制.By using the modified finite-difference time-domain （FDTD） method for the electromagnetic scattering of the magnetized plasma, the band gap properties of the one-dimensional space-varying magnetized and unmagnetized plasma photonic crystals （PPC） are studied. With the differential Gaussian pulse for the incidence source, the reflection coefficients of the PPC are computed with the normal inci- dence condition, and its plasma frequency varies with the space as the yariation of the periodic Gauss pulse function. The characteristics for the forbidden band gap of the PPC are analyzed under the condition of the different space pulse-width. The results show that the band gap can be achieved on control by changing the plasma frequency in different space changes.

关 键 词：时域有限差分方法 光子晶体 等离子体 光子带隙 

分 类 号：O441[理学—电磁学]