Crossover from renormalized to conventional diffusion near the three-dimensional Anderson localization transition for light
Laura A. Cobus, G. Maret, Alexandre Aubry
Abstract
We report on anomalous light transport in the strong scattering regime. Using low-coherence interferometry, we measure the reflection matrix of titanium dioxide powders, revealing crucial features of strong optical scattering which cannot be observed with transmission measurements: (i) a subdiffusive regime of transport at early times of flight that is a direct consequence of predominant recurrent scattering loops and (ii) a crossover to a conventional, but extremely slow, diffusive regime at long times. These observations support previous predictions that near-field coupling between scatterers prohibits Anderson localization of light in three-dimensional disordered media.
Topics & Concepts
CrossoverAnderson localizationScatteringLight scatteringPhysicsCondensed matter physicsCoherence (philosophical gambling strategy)DiffusionCoupling (piping)Statistical physicsOpticsMaterials scienceQuantum mechanicsComputer scienceMetallurgyArtificial intelligenceRandom lasers and scattering mediaQuantum optics and atomic interactionsOptical Polarization and Ellipsometry