由色散材料构成的体心立方晶体的光子能带计算(英文)

Photonic Band Structures of BCC Crystals Containing Dispersive Material

计算了小球排列构成的体心立方结构的光子带隙性质 ,小球的介电函数可以是极化激元型或等离子型 .虽然在通常的介电材料体心立方结构中并不容易形成光子带隙 ,但在我们考虑的这两类情况中均发现绝对带隙 .本文中讨论的光子能带结构是由非常有效的矢量波多重散射方法计算 ,该方法可以精确地处理介电函数在界面附近的突变 .

The photonic band gap properties of an array of spheres arranged in the body-center-cubic(BCC)structure have been calculated.The spheres are made up of dielectric material that has dielectric properties describable by the polariton and plasmon-type dispersion relationship.We find that absolute photonic gaps can be obtained in both cases although the BCC structure is known to be unfavorable for the formation of photonic band gaps.The photonic band structures are calculated by an efficient vector-wave multiple scattering method which can deal accurately with the sharp changes of dielectric functions near the interface.