Localization of light in a three-dimensional disordered crystal of atoms

Article

关键词: PHOTONIC CRYSTAL;    ANDERSON LOCALIZATION;    SCALING THEORY;    INSULATOR;    CONDUCTANCE;    TRANSITION;    DISTRIBUTIONS;    DIFFUSION;    DYNAMICS;    ABSENCE;   

DOI  :  10.1103/PhysRevB.102.134206

来源: SCIE

【 摘 要 】

We demonstrate that a weak disorder in atomic positions introduces spatially localized optical modes in a dense three-dimensional ensemble of immobile two-level atoms arranged in a diamond lattice and coupled by the electromagnetic field. The frequencies of the localized modes concentrate near band edges of the unperturbed lattice. Finite-size scaling analysis of the percentiles of Thouless conductance reveals two mobility edges and yields an estimation nu = 0.8-1.1 for the critical exponent of the localization length. The localized modes disappear when the disorder becomes too strong and the system starts to resemble a fully disordered one where all modes are extended.

【 授权许可】

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