Localization of transverse waves in randomly layered media at oblique incidence
Localization of transverse waves in randomly layered media at oblique incidence
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DOI：
10.1103/physrevb.70.245121
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发表时间：
2004-12-01
影响因子：
3.7
通讯作者：
Freilikher, VD
中科院分区：
文献类型：
--
作者：
Bliokh, KY;Freilikher, VD
研究了强无序极限下电磁波斜入射到随机分层介质上的问题。基于零能流和全相位随机化假设，提出了一种计算逆局域化长度的近似方法。研究了垂直入射时未发现的两种效应：偏振态对局域化长度的依赖性和小折射率层内反射引起的局域化长度的减小。P-偏振辐射的逆局部化长度（衰减率）总是小于S波，这就是说，足够长的随机分层样品极化透射辐射。P偏振的局域化长度非单调地依赖于传播角度，并且在某些条件下在某个角度处变为无穷大，这意味着典型的（非共振）随机实现在该入射角处变得透明（随机布鲁斯特效应）。
We investigate the oblique incidence of electromagnetic waves on a randomly layered medium in the limit of strong disorder. An approximate method for calculating the inverse localization length based on the assumptions of zero-energy flux and complete phase stochastization is presented. Two effects not found at normal incidence have been studied: dependence of the localization length on the polarization and decrease of the localization length due to the internal reflections from layers with small refractive indexes. The inverse localization length (attenuation rate) for P-polarized radiation is shown to be always smaller than that of S waves, which is to say that long enough randomly layered sample polarizes transmitted radiation. The localization length for P polarization depends nonmonotonically on the angle of propagation and under certain conditions turns to infinity at some angle, which means that typical (nonresonant) random realizations become transparent at this angle of incidence (stochastic Brewster effect).