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Article Dans Une Revue Physical Review B Année : 2020

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

Résumé

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 ν = 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.
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Dates et versions

hal-02975316 , version 1 (01-10-2021)

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Sergey E Skipetrov. Localization of light in a three-dimensional disordered crystal of atoms. Physical Review B, 2020, 102 (13), pp.134206. ⟨10.1103/PhysRevB.102.134206⟩. ⟨hal-02975316⟩

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