论文标题
纵向模式扩散和局部
Longitudinal modes in diffusion and localization of light
论文作者
论文摘要
在这项工作中，我们将纵向电磁波的弹性散射在传输理论中使用填充有点状电偶极子的介质。纵向波和横向波之间的干扰产生了两个新通道，其中一个允许能量传输。通过将辐射传递的独立散射框架扩展到包括二进制偶极 - 偶极相互作用来制定这张图片。我们通过考虑状态，电气和洛伦兹局部场的密度来计算新运输通道中光的扩散常数，并研究纵向波的作用。在强烈的散射状态中，不同的运输机制逐渐施加并施加电磁波的最小电导率，从而防止了安德森在培养基中的定位。我们扩展了本地化的自洽理论，并将预测与广泛的数值模拟进行了比较。
In this work we include the elastic scattering of longitudinal electromagnetic waves in transport theory using a medium filled with point-like, electric dipoles. The interference between longitudinal and transverse waves creates two new channels among which one allows energy transport. This picture is worked out by extending the independent scattering framework of radiative transfer to include binary dipole-dipole interactions. We calculate the diffusion constant of light in the new transport channel and investigate the role of longitudinal waves in other aspects of light diffusion by considering the density of states, equipartition, and Lorentz local field. In the strongly scattering regime, the different transport mechanisms couple and impose a minimum conductivity of electromagnetic waves, thereby preventing Anderson localization of light in the medium. We extend the self-consistent theory of localization and compare the predictions to extensive numerical simulations.
