Near-field thermal radiation transfer controlled by plasmons in graphene

Ognjen Ilic, Marinko Jablan, John D. Joannopoulos, Ivan Celanovic, Hrvoje Buljan, Marin Soljačić

Research output: Contribution to journalArticle

130 Scopus citations

Abstract

It is shown that thermally excited plasmon-polariton modes can strongly mediate, enhance, and tune the near-field radiation transfer between two closely separated graphene sheets. The dependence of near-field heat exchange on doping and electron relaxation time is analyzed in the near infrared within the framework of fluctuational electrodynamics. The dominant contribution to heat transfer can be controlled to arise from either interband or intraband processes. We predict maximum transfer at low doping and for plasmons in two graphene sheets in resonance, with orders-of-magnitude enhancement (e.g., 102 to 103 for separations between 0.1 μm and 10 nm) over the Stefan-Boltzmann law, known as the far-field limit. Strong, tunable, near-field transfer offers the promise of an externally controllable thermal switch as well as a novel hybrid graphene-graphene thermoelectric/thermophotovoltaic energy conversion platform.

Original languageEnglish (US)
Article number155422
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number15
DOIs
StatePublished - Apr 11 2012
Externally publishedYes

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