Chiral plasmon in gapped Dirac systems

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

doi:10.1103/PhysRevB.93.041413

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.

Original language	English (US)
Article number	041413
Journal	Physical Review B
Volume	93
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevB.93.041413
State	Published - 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.

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© 2016 American Physical Society.

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10.1103/PhysRevB.93.041413

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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.",

author = "Anshuman Kumar and Andrei Nemilentsau and Fung, {Kin Hung} and George Hanson and Fang, {Nicholas X.} and Tony Low",

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. Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

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AU - Kumar, Anshuman

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AU - Fung, Kin Hung

AU - Hanson, George

AU - Fang, Nicholas X.

AU - Low, Tony

N1 - 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. Publisher Copyright: © 2016 American Physical Society.

PY - 2016/1/19

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N2 - 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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Chiral plasmon in gapped Dirac systems

Abstract

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