Corner- and edge-mode enhancement of near-field radiative heat transfer
Lei Tang,
Lívia M. Corrêa,
Mathieu Francoeur () and
Chris Dames ()
Additional contact information
Lei Tang: University of California at Berkeley
Lívia M. Corrêa: University of Utah
Mathieu Francoeur: University of Utah
Chris Dames: University of California at Berkeley
Nature, 2024, vol. 629, issue 8010, 67-73
Abstract:
Abstract It is well established that near-field radiative heat transfer (NFRHT) can exceed Planck’s blackbody limit1 by orders of magnitude owing to the tunnelling of evanescent electromagnetic frustrated and surface modes2–4, as has been demonstrated experimentally for NFRHT between two large parallel surfaces5–7 and between two subwavelength membranes8,9. However, although nanostructures can also sustain a much richer variety of localized electromagnetic modes at their corners and edges10,11, the contributions of such additional modes to further enhancing NFRHT remain unexplored. Here we demonstrate both theoretically and experimentally a physical mechanism of NFRHT mediated by the corner and edge modes, and show that it can dominate the NFRHT in the ‘dual nanoscale regime’ in which both the thickness of the emitter and receiver, and their gap spacing, are much smaller than the thermal photon wavelengths. For two coplanar 20-nm-thick silicon carbide membranes separated by a 100-nm vacuum gap, the NFRHT coefficient at room temperature is both predicted and measured to be 830 W m−2 K−1, which is 5.5 times larger than that for two infinite silicon carbide surfaces separated by the same gap, and 1,400 times larger than the corresponding blackbody limit accounting for the geometric view factor between two coplanar membranes. This enhancement is dominated by the electromagnetic corner and edge modes, which account for 81% of the NFRHT between the silicon carbide membranes. These findings are important for future NFRHT applications in thermal management and energy conversion.
Date: 2024
References: Add references at CitEc
Citations:
Downloads: (external link)
https://www.nature.com/articles/s41586-024-07279-2 Abstract (text/html)
Access to the full text of the articles in this series is restricted.
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX
RIS (EndNote, ProCite, RefMan)
HTML/Text
Persistent link: https://EconPapers.repec.org/RePEc:nat:nature:v:629:y:2024:i:8010:d:10.1038_s41586-024-07279-2
Ordering information: This journal article can be ordered from
https://www.nature.com/
DOI: 10.1038/s41586-024-07279-2
Access Statistics for this article
Nature is currently edited by Magdalena Skipper
More articles in Nature from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().