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】
Free