Gap deformation and classical wave localization in disordered two-dimensional photonic-band-gap materials
Gap deformation and classical wave localization in disordered two-dimensional photonic-band-gap materials
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DOI：
10.1103/physrevb.61.13458
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发表时间：
2000-02
影响因子：
3.7
通讯作者：
E. Lidorikis;M. Sigalas;C. Soukoulis;E. Economou
中科院分区：
文献类型：
--
作者：
E. Lidorikis;M. Sigalas;C. Soukoulis;E. Economou
通过使用两种从头计算数值方法，我们研究了无序对二维光子带隙材料中的光谱间隙和波局域化的影响。我们发现，根据晶格实现（空气中的固体介电圆柱体或反之亦然）、波极化以及引入无序的特定形式，基本上有两种不同的响应。采用两种不同的光子态图像，即“近自由”光子和“强局域”光子。这些源于导致光谱间隙形成的两种不同机制，即多重散射和单散射体共振，它们定性地解释了我们的结果。
By using two ab initio numerical methods, we study the effects that disorder has on the spectral gaps and on wave localization in two-dimensional photonic-band-gap materials. We find that there are basically two different responses depending on the lattice realization ~solid dielectric cylinders in air or vice versa !, the wave polarization, and the particular form under which disorder is introduced. Two different pictures for the photonic states are employed, the ‘‘nearly free’’ photon and the ‘‘strongly localized’’ photon. These originate from the two different mechanisms responsible for the formation of the spectral gaps, i.e., multiple scattering and single scatterer resonances, and they qualitatively explain our results.