Journal
2D MATERIALS
Volume 3, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2053-1583/3/1/015011
Keywords
Graphene plasmons; birefringent absorption; electrically tunable non-reciprocity
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Funding
- EC [CNECTICT-604391]
- MIUR
- Research Foundation Flanders (FWO-Vl)
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We present 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.
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