Current-induced birefringent absorption and non-reciprocal plasmons in graphene

Ben Van Duppen, Andrea Tomadin, Alexander N. Grigorenko, Marco Polini

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    Abstract

    Wepresent extensive calculations of the optical and plasmonic properties of a graphene sheet carrying a dc current. By calculating analytically the density-density response function of current-carrying states at finite temperature, we demonstrate that an applied dc current modifies the Pauli blocking mechanism and that absorption acquires a birefringent character with respect to the angle between the in-plane light polarization and current flow. Employing random phase approximation at finite temperature, we show that graphene plasmons display a degree of non-reciprocity and collimation that can be tuned with the applied current. We discuss the possibility to measure these effects.

    Original languageEnglish
    Article number015011
    Journal2 D Materials
    Volume3
    Issue number1
    DOIs
    Publication statusPublished - 22 Feb 2016

    Keywords

    • Birefringent absorption
    • Electrically tunable non-reciprocity
    • Graphene plasmons

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