Spectral and polarization dependencies of luminescence by hot carriers in graphene

Details Spectral and polarization dependencies of luminescence by hot carriers in graphene Spectral and polarization dependencies of luminescence by hot carriers in graphene

2010-07-14

arxiv.org/abs/1007.2321v1

Physical Review B 82, 165449 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 5 figures

Scientific paper

10.1103/PhysRevB.82.165449

The luminescence caused by the interband transitions of hot carriers in graphene is considered theoretically. The dependencies of emission in mid- and near-IR spectral regions versus energy and concentration of hot carriers are analyzed; they are determined both by an applied electric field and a gate voltage. The polarization dependency is determined by the angle between the propagation direction and the normal to the graphene sheet. The characteristics of radiation from large-scale-area samples of epitaxial graphene and from microstructures of exfoliated graphene are considered. The averaged over angles efficiency of emission is also presented.

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