Active Radiative Thermal Switching with Graphene Plasmon Resonators
Name
Active Radiative Thermal Switching with Graphene Plasmon Resonators.pdf
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Author(s)
Ilic, Ognjen
Thomas, Nathan H.
Christensen, Thomas
Sherrott, Michelle C.
Soljacic, Marin
Minnich, Austin J.
Miller, Owen D.
Atwater, Harry A.
Date Issued
March 2018
Journal
ACS Nano
Publisher
American Chemical Society (ACS)
Citation
Ilic, Ognjen et al. “Active Radiative Thermal Switching with Graphene Plasmon Resonators.” ACS Nano 12, 3 (March 2018): 2474–2481 © 2018 American Chemical Society
Version
Author's final manuscript
Abstract
We theoretically demonstrate a near-field radiative thermal switch based on thermally excited surface plasmons in graphene resonators. The high tunability of graphene enables substantial modulation of near-field radiative heat transfer, which, when combined with the use of resonant structures, overcomes the intrinsically broadband nature of thermal radiation. In canonical geometries, we use nonlinear optimization to show that stacked graphene sheets offer improved heat conductance contrast between "ON" and "OFF" switching states and that a >10× higher modulation is achieved between isolated graphene resonators than for parallel graphene sheets. In all cases, we find that carrier mobility is a crucial parameter for the performance of a radiative thermal switch. Furthermore, we derive shape-agnostic analytical approximations for the resonant heat transfer that provide general scaling laws and allow for direct comparison between different resonator geometries dominated by a single mode. The presented scheme is relevant for active thermal management and energy harvesting as well as probing excited-state dynamics at the nanoscale. Keywords: graphene; thermal radiation; near-field radiative heat transfer; surface plasmon
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1021/ACSNANO.7B08231
