Chiral plasmon in gapped Dirac systems

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

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

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.

Original languageEnglish (US)
Article number041413
JournalPhysical Review B
Volume93
Issue number4
DOIs
StatePublished - Jan 19 2016

Bibliographical note

Funding Information:
National Science Foundation http://dx.doi.org/10.13039/100000001 NSF http://sws.geonames.org/6252001/ http://sws.geonames.org/6254928/ CMMI-1120724 DMR-1420013 Air Force Office of Scientific Research http://dx.doi.org/10.13039/100000181 AFOSR http://sws.geonames.org/6252001/ http://sws.geonames.org/6254928/ FA9550-12-1-0488 A.K. and N.X.F. acknowledge the financial support by the NSF (Grant No. CMMI-1120724) and AFOSR MURI (Award No. FA9550-12-1-0488). K.H.F. acknowledges financial support from Hong Kong RGC Grant No. 15300315. T.L. acknowledges support from the MRSEC Program of the National Science Foundation under Award No. DMR-1420013.

How much support was provided by MRSEC?

  • Partial

Reporting period for MRSEC

  • Period 3

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