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Measurement of Near-Field Radiative Heat Transfer at Deep Sub-Wavelength Distances using Nanomechanical Resonators.

Authors :
Giroux M
Stephan M
Brazeau M
Molesky S
Rodriguez AW
Krich JJ
Hinzer K
St-Gelais R
Source :
Nano letters [Nano Lett] 2023 Sep 27; Vol. 23 (18), pp. 8490-8497. Date of Electronic Publication: 2023 Sep 06.
Publication Year :
2023

Abstract

Near-field radiative heat transfer (NFRHT) measurements often rely on custom microdevices that can be difficult to reproduce after their original demonstration. Here we study NFRHT using plain silicon nitride (SiN) membrane nanomechanical resonators─a widely available substrate used in applications such as electron microscopy and optomechanics─and on which other materials can easily be deposited. We report measurements down to a minimal distance of 180 nm between a large radius of curvature (15.5 mm) glass radiator and a SiN membrane resonator. At such deep sub-wavelength distance, heat transfer is dominated by surface polariton resonances over a (0.25 mm) <superscript>2</superscript> effective area, which is comparable to plane-plane experiments employing custom microfabricated devices. We also discuss how measurements using nanomechanical resonators create opportunities for simultaneously measuring near-field radiative heat transfer and thermal radiation forces (e.g., thermal corrections to Casimir forces).

Details

Language :
English
ISSN :
1530-6992
Volume :
23
Issue :
18
Database :
MEDLINE
Journal :
Nano letters
Publication Type :
Academic Journal
Accession number :
37671916
Full Text :
https://doi.org/10.1021/acs.nanolett.3c02049