Transport through an AC-driven impurity: Fano interference and bound states in the continuum

Using the Floquet formalism we study transport through an AC-driven impurity in a tight binding chain. The results obtained are exact and valid for all frequencies and barrier amplitudes. At frequencies comparable to the bulk bandwidth we observe a breakdown of the transmission T = 0 which is relate...

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Bibliographic Details
Published in:New journal of physics 2017-04, Vol.19 (4), p.43029
Main Authors: Reyes, Sebastián A, Thuberg, Daniel, Pérez, Daniel, Dauer, Christoph, Eggert, Sebastian
Format: Article
Language:English
Subjects:
Amplitudes
driven systems
Impurities
Physics
Transport
transport properties
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Summary:Using the Floquet formalism we study transport through an AC-driven impurity in a tight binding chain. The results obtained are exact and valid for all frequencies and barrier amplitudes. At frequencies comparable to the bulk bandwidth we observe a breakdown of the transmission T = 0 which is related to the phenomenon of Fano resonances associated to AC-driven bound states in the continuum. We also demonstrate that the location and width of these resonances can be modified by tuning the frequency and amplitude of the driving field. At high frequencies there is a close relation between the resonances and the phenomenon of coherent destruction of tunneling. As the frequency is lowered no more resonances are possible below a critical value and the results approach a simple time average of the static transmission.
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/aa66fe