基于法拉第效应磁化等离子体光子晶体FDTD分析  

Analysis of magnetized plasma photonic crystals on the basis of the faraday effect by finite-difference time-domain method

作　　者：刘崧[1] 刘少斌[2] 

机构地区：[1]南昌大学物理系,南昌330031 [2]南京航空航天大学信息科学与技术学院,南京210016

出　　处：《核聚变与等离子体物理》2010年第3期225-229,共5页Nuclear Fusion and Plasma Physics

基　　金：国家自然科学基金资助项目(60971122);江西省自然科学基金资助项目(2009GZW0016)

摘　　要：通过增加外磁场来调控等离子体光子晶体的光子带隙结构,采用时域有限差分算法分析了由本征层为磁化等离子体层和其他电介质材料层交替堆叠而成的磁化等离子体光子晶体的光子带隙结构,数值模拟中采用完全匹配层吸收边界条件以防止边界的反射。由于外磁场的法拉第磁光效应,使等离子体的介电常数随着外磁场的变化而改变。数值结果表明,等离子体光子晶体的带隙特性在一定的频率范围相应地得到调节,实现了频率低于等离子体频率的电磁波也能在等离子体中传播。The photonic band gap（PBG） structures of plasma photonic crystals（PPCs） can be turned after being added an applied magnetic field.The PPCs consisting of an intrinsic plasma layers and other dielectric material layers stacked alternately,is taken as an example in studying photonic band gap structures and transmission spectra within the magnetic field using finite-difference time-domain（FDTD） algorithm.A perfectly matched layer absorbing boundary condition is employed to deal with the numerical non-reflection boundary in these simulations.Due to the Faraday effect,the dielectric constant of the plasma is modified differently in different frequency ranges.As a result,the PBG characteristics of the PPCs are turned correspondingly.Interestingly,the electromagnetic wave transmission below the plasma frequency can be realized.

关 键 词：等离子体光子晶体 光子带隙 法拉第效应 时域有限差分算法 

分 类 号：TN011[电子电信—物理电子学]