Breakdown of diffusion in dynamics of extended waves in mesoscopic media
Breakdown of diffusion in dynamics of extended waves in mesoscopic media
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DOI：
10.1103/physrevlett.90.203903
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发表时间：
2003-05-23
影响因子：
8.6
通讯作者：
Genack, AZ
中科院分区：
文献类型：
--
作者：
Chabanov, AA;Zhang, ZQ;Genack, AZ
本文报道了脉冲微波通过准一维随机介质传输的非指数衰减现象，这表明扩散模型的破坏。透射率衰减率随时间近似线性下降，对应于样品表面准正则电磁模与自由空间耦合强度的近似高斯分布。分布峰和宽度分别为L-2.05和L-1.81。
We report the observation of nonexponential decay of pulsed microwave transmission through quasi-one-dimensional random dielectric media signaling the breakdown of the diffusion model. The decay rate of transmission falls nearly linearly in time corresponding to a nearly Gaussian distribution of the coupling strengths of quasinormal electromagnetic modes to free space at the sample surfaces. The peak and width of this distribution scale as L-2.05 and L-1.81, respectively.