EFFECTIVE DIELECTRIC-CONSTANT OF PERIODIC COMPOSITE STRUCTURES
EFFECTIVE DIELECTRIC-CONSTANT OF PERIODIC COMPOSITE STRUCTURES
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DOI：
10.1103/physrevb.48.14936
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发表时间：
1993-11-15
影响因子：
3.7
通讯作者：
SOUKOULIS, CM
中科院分区：
文献类型：
--
作者：
DATTA, S;CHAN, CT;SOUKOULIS, CM
利用平面波展开法，我们得到了复合周期性介质材料的有效介电常数的表达式，作为光子带结构问题的长波极限。计算了几种光子带隙结构的有效介电常数，发现在长波极限下，它们可以是各向同性的、单轴的或双轴的，这取决于所考虑的结构的对称性。我们还发现标量波近似对有效介电常数给出了很差的结果，而麦克斯韦-加内特理论在低填充比的情况下提供了很好的近似。
Using a plane-wave-expansion method, we obtained expressions for the effective dielectric constants-of composite periodic dielectric materials as the long-wavelength limit of the photonic-band-structure problem. The effective dielectric constants of several classes of photonic-band-gap structures are computed and we found that in the long-wavelength limit, they can be isotropic, uniaxial, or biaxial, depending on the symmetry of the structure under consideration. We also found that the scalar wave approximation gives poor results for effective dielectric constants while the Maxwell-Garnett theory offers very good approximations in the low-filling-ratio regimes.