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arXiv · 1509.00790

Chiral plasmon in gapped Dirac systems

Anshuman Kumar·Andrei Nemilentsau·Kin Hung Fung·George Hanson·Nicholas X. Fang·Tony Low
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Abstract

We study the electromagnetic response and surface electromagnetic modes in a generic gapped Dirac material under pumping with circularly polarized light. The valley imbalance due to pumping leads to a net Berry curvature, giving rise to a finite transverse conductivity. We discuss the appearance of nonreciprocal chiral edge modes, their hybridization and waveguiding in a nanoribbon geometry, and giant polarization rotation in nanoribbon arrays.

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Anshuman Kumar, Andrei Nemilentsau, Kin Hung Fung, George Hanson, Nicholas X. Fang, Tony Low. 2015-12-28. Chiral plasmon in gapped Dirac systems. https://doi.org/10.1103/physrevb.93.041413

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