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Title: Active thermal extraction of near-field thermal radiation

Journal Article · · Physical Review B
 [1];  [1];  [1]
  1. California Inst. of Technology (CalTech), Pasadena, CA (United States)

Radiative heat transport between materials supporting surface-phonon polaritons is greatly enhanced when the materials are placed at subwavelength separation as a result of the contribution of near-field surface modes. However, the enhancement is limited to small separations due to the evanescent decay of the surface waves. In this work, we propose and numerically demonstrate an active scheme to extract these modes to the far field. Our approach exploits the monochromatic nature of near-field thermal radiation to drive a transition in a laser gain medium, which, when coupled with external optical pumping, allows the resonant surface mode to be emitted into the far field. Finally, our study demonstrates an approach to manipulate thermal radiation that could find applications in thermal management.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Light-Material Interactions in Energy Conversion (LMI)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001293
OSTI ID:
1387856
Alternate ID(s):
OSTI ID: 1236726
Journal Information:
Physical Review B, Vol. 93, Issue 8; Related Information: LMI partners with California Institute of Technology (lead); Harvard University; University of Illinois, Urbana-Champaign; Lawrence Berkeley National Laboratory; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

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Cited By (2)

Near-field refrigeration and tunable heat exchange through four-wave mixing journal May 2018
Near-field refrigeration and tunable heat exchange through four-wave mixing text January 2017