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Laser-induced quantum pumping in graphene

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Article number153506
<mark>Journal publication date</mark>8/10/2012
<mark>Journal</mark>Applied Physics Letters
Issue number15
Volume101
Publication StatusPublished
<mark>Original language</mark>English

Abstract

We investigate non-adiabatic electron pumping in graphene generated by laser irradiation with linear polarization parallel or perpendicular to the transport direction. Transport is dominated by the spatially asymmetric excitation of electrons from evanescent into propagating modes. For a laser with parallel polarization, the pumping response exhibits a subharmonic resonant enhancement which directly probes the Fermi energy; no such enhancement occurs for perpendicular polarization. The resonance mechanism relies on the chirality of charge carriers in
graphene.