Publikation: Observation of the critical regime near Anderson localization of light
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The transition from diffusive transport to localization of waves should occur for any type of classical or quantum wave in any media as long as the wavelength becomes comparable to the transport mean free path ℓ*. The signatures of localization and those of absorption, or bound states, can, however, be similar, such that an unequivocal proof of the existence of wave localization in disordered bulk materials is still lacking. Here we present time resolved measurements of light transport through strongly scattering samples with kℓ* values as low as 2.5. In transmission, we observe deviations from diffusion which cannot be explained by absorption, sample geometry, or reduction in transport velocity. Furthermore, the deviations from classical diffusion increase strongly with decreasing ℓ* as expected for a phase transition. This constitutes an experimental realization of the critical regime in the approach to Anderson localization.
In this paper we present time resolved measurements of optical transmission, which show clear deviations from classical diffusion. These deviations increase with increasing turbidity, providing experimental evidence for the onset of Anderson localization of light.
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STÖRZER, Martin, Peter GROSS, Christof M. AEGERTER, Georg MARET, 2006. Observation of the critical regime near Anderson localization of light. In: Physical Review Letters. 2006, 96(6). ISSN 0031-9007. Available under: doi: 10.1103/PhysRevLett.96.063904BibTex
@article{Storzer2006Obser-16689,
year={2006},
doi={10.1103/PhysRevLett.96.063904},
title={Observation of the critical regime near Anderson localization of light},
number={6},
volume={96},
issn={0031-9007},
journal={Physical Review Letters},
author={Störzer, Martin and Gross, Peter and Aegerter, Christof M. and Maret, Georg}
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<dcterms:abstract xml:lang="eng">The transition from diffusive transport to localization of waves should occur for any type of classical or quantum wave in any media as long as the wavelength becomes comparable to the transport mean free path ℓ*. The signatures of localization and those of absorption, or bound states, can, however, be similar, such that an unequivocal proof of the existence of wave localization in disordered bulk materials is still lacking. Here we present time resolved measurements of light transport through strongly scattering samples with kℓ* values as low as 2.5. In transmission, we observe deviations from diffusion which cannot be explained by absorption, sample geometry, or reduction in transport velocity. Furthermore, the deviations from classical diffusion increase strongly with decreasing ℓ* as expected for a phase transition. This constitutes an experimental realization of the critical regime in the approach to Anderson localization.<br /><br />In this paper we present time resolved measurements of optical transmission, which show clear deviations from classical diffusion. These deviations increase with increasing turbidity, providing experimental evidence for the onset of Anderson localization of light.</dcterms:abstract>
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