Plasmons enhance near-field radiative heat transfer for graphene-covered dielectrics

Details Plasmons enhance near-field radiative heat transfer for graphene-covered dielectrics Plasmons enhance near-field radiative heat transfer for graphene-covered dielectrics

2012-01-09

arxiv.org/abs/1201.1824v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 figures, submitted to PRL 14.11.2011

Scientific paper

It is shown that a graphene layer on top of a dielectric slab can dramatically influence the ability of this dielectric for radiative heat exchange. Effect of graphene is related to thermally excited plasmons. Frequency of these resonances lies in the terahertz region and can be tuned by varying the Fermi level through doping or gating. Heat transfer between two dielectrics covered with graphene can be larger than that between best known materials and even much larger at low temperatures. Moreover, high heat transfer can be significantly modulated by electrical means that opens up new possibilities for very fast manipulations with the heat flux.

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