Near-field thermal radiation transfer controlled by plasmons in graphene

Ilić, Ognjen and Jablan, Marinko and Joannopoulos, John D. and Celanović, Ivan and Buljan, Hrvoje and Soljačić, Marin (2012) Near-field thermal radiation transfer controlled by plasmons in graphene. Physical Review B, 85 (15). pp. 155422-4. ISSN 1098-0121

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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., 10^2 to 10^3 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.

Item Type: Article
Keywords: near field, heat transfer, plasmons, graphene
Date: April 2012
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2012) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-0000000-1015
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 03 Jun 2014 12:24
Last Modified: 23 Feb 2016 16:08
URI: http://digre.pmf.unizg.hr/id/eprint/2166

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