Fano interference governs wave transport in disordered systems

Alexander N. Poddubny (), Mikhail V. Rybin, Mikhail F. Limonov and Yuri S. Kivshar
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Alexander N. Poddubny: National Research University for Information Technology, Mechanics and Optics (ITMO)
Mikhail V. Rybin: National Research University for Information Technology, Mechanics and Optics (ITMO)
Mikhail F. Limonov: National Research University for Information Technology, Mechanics and Optics (ITMO)
Yuri S. Kivshar: National Research University for Information Technology, Mechanics and Optics (ITMO)

Nature Communications, 2012, vol. 3, issue 1, 1-10

Abstract: 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.

Date: 2012
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms1924

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DOI: 10.1038/ncomms1924

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