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The single-channel regime of transport through random media

Author

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  • A. Peña

    (University of Texas at San Antonio)

  • A. Girschik

    (Institute for Theoretical Physics, Vienna University of Technology)

  • F. Libisch

    (Princeton University)

  • S. Rotter

    (Institute for Theoretical Physics, Vienna University of Technology)

  • A. A. Chabanov

    (University of Texas at San Antonio)

Abstract

The propagation of light through samples with random inhomogeneities can be described by way of transmission eigenchannels, which connect incoming and outgoing external propagating modes. Although the detailed structure of a disordered sample can generally not be fully specified, these transmission eigenchannels can nonetheless be successfully controlled and used for focusing and imaging light through random media. Here we demonstrate that in deeply localized quasi-1D systems, the single dominant transmission eigenchannel is formed by an individual Anderson-localized mode or by a ‘necklace state’. In this single-channel regime, the disordered sample can be treated as an effective 1D system with a renormalized localization length, coupled through all the external modes to its surroundings. Using statistical criteria of the single-channel regime and pulsed excitations of the disordered samples allows us to identify long-lived localized modes and short-lived necklace states at long and short time delays, respectively.

Suggested Citation

  • A. Peña & A. Girschik & F. Libisch & S. Rotter & A. A. Chabanov, 2014. "The single-channel regime of transport through random media," Nature Communications, Nature, vol. 5(1), pages 1-8, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4488
    DOI: 10.1038/ncomms4488
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