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Fano interference governs wave transport in disordered systems

Author

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  • Alexander N. Poddubny

    (National Research University for Information Technology, Mechanics and Optics (ITMO)
    Ioffe Physical-Technical Institute)

  • Mikhail V. Rybin

    (National Research University for Information Technology, Mechanics and Optics (ITMO)
    Ioffe Physical-Technical Institute)

  • Mikhail F. Limonov

    (National Research University for Information Technology, Mechanics and Optics (ITMO)
    Ioffe Physical-Technical Institute)

  • Yuri S. Kivshar

    (National Research University for Information Technology, Mechanics and Optics (ITMO)
    Nonlinear Physics Center, Research School of Physics and Engineering, Australian National University)

Abstract

Light localization in disordered systems and Bragg scattering in regular periodic structures are considered traditionally as two entirely opposite phenomena: disorder leads to degradation of coherent Bragg scattering whereas Anderson localization is suppressed by periodicity. Here we reveal a non-trivial link between these two phenomena, through the Fano interference between Bragg scattering and disorder-induced scattering, that triggers both localization and de-localization in random systems. We find unexpected transmission enhancement and spectrum inversion when the Bragg stop-bands are transformed into the Bragg pass-bands solely owing to disorder. Fano resonances are always associated with coherent scattering in regular systems, but our discovery of disorder-induced Fano resonances may provide novel insights into many features of the transport phenomena of photons, phonons, and electrons. Owning to ergodicity, the Fano resonance is a fingerprint feature for any realization of the structure with a certain degree of disorder.

Suggested Citation

  • Alexander N. Poddubny & Mikhail V. Rybin & Mikhail F. Limonov & Yuri S. Kivshar, 2012. "Fano interference governs wave transport in disordered systems," Nature Communications, Nature, vol. 3(1), pages 1-10, January.
    • Handle: RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms1924
    DOI: 10.1038/ncomms1924
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