Abstract

We numerically study photon escape rates from three-dimensional atomic gases and investigate the respective roles of cooperative effects and disorder in photon localization, while taking into account the vectorial nature of light. A scaling behavior is observed for the escape rates, and photons undergo a crossover from delocalization toward localization as the optical thickness of the cloud is increased. This result indicates that light localization is dominated by cooperative effects rather than disorder. We compare our results with those obtained in the case of a scalar radiation field and find no significant differences. We conclude that the scalar model constitutes an excellent approximation when considering photon escape rates from atomic gases.

Graphic abstract

中文翻译：

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合作效应和无序在光子定位中的作用：矢量辐射场的情况

摘要

我们数值研究三维原子气体中的光子逸出率，并研究了协同效应和无序在光子定位中的各自作用，同时考虑了光的矢量性质。观察到了逃逸速率的缩放行为，并且随着云的光学厚度增加，光子经历了从离域到局部的交叉。该结果表明，光的局部化是由协同作用而不是杂乱主导的。我们将我们的结果与在标量辐射场的情况下获得的结果进行比较，发现没有显着差异。我们得出的结论是，当考虑原子气体的光子逸出率时，标量模型构成了极好的近似值。

图形摘要