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Near-Field Radiative Heat Transfer Modulation with an Ultrahigh Dynamic Range through Mode Mismatching

Nano letters, 2022-10, Vol.22 (19), p.7753 [Peer Reviewed Journal]

ISSN: 1530-6992 ;ISSN: 1530-6984 ;EISSN: 1530-6992 ;DOI: 10.1021/acs.nanolett.2c01286

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Title:
Near-Field Radiative Heat Transfer Modulation with an Ultrahigh Dynamic Range through Mode Mismatching
Author: Shi, K. ; Chen, Z. ; Xing, Y. ; Yang, J. ; Xu, X. ; Evans, J. S. ; He, Sailing
Subjects: Electrodynamics ; Electromagnetic wave polarization ; fluctuational electrodynamics ; graphene ; Heat transfer ; Heat transfer measurements ; mode mismatching ; Modulation ; modulation of near-field radiative heat transfer ; Near fields ; Phonons ; Photons ; Plasmon-polaritons ; Radiative heat transfer ; radiative heat transfer measurement ; Radiative transfer ; Surface plasmon polariton coupling ; surface plasmon polaritons coupling ; Surface plasmon resonance ; Surface-plasmon ; Thermal Engineering
Is Part Of: Nano letters, 2022-10, Vol.22 (19), p.7753
Description: Modulating near-field radiative heat transfer (NFRHT) with a high dynamic range is challenging in nanoscale thermal science and engineering. Modulation depths [(maximum value - minimum value)/(maximum value + minimum value) × 100%] of ≈2% to ≈15.7% have been reported with matched modes, but breaking the constraint of mode matching theoretically allows for higher modulation depth. We demonstrate a modulation depth of ≈32.2% by a pair of graphene-covered SU8 heterostructures at a gap distance of ≈80 nm. Dissimilar Fermi levels tuned by bias voltages enable mismatched surface plasmon polaritons which improves the modulation. The modulation depth when switching from a matched mode to a mismatched mode is ≈4.4-fold compared to that when switching between matched modes. This work shows the importance of symmetry in polariton-mediated NFRHT and represents the largest modulation depth to date in a two-body system with fixed gap distance and temperature.
Language: English
Identifier: ISSN: 1530-6992
ISSN: 1530-6984
EISSN: 1530-6992
DOI: 10.1021/acs.nanolett.2c01286
Source: SWEPUB Freely available online

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Near-Field Radiative Heat Transfer Modulation with an Ultrahigh Dynamic Range through Mode Mismatching

ISSN: 1530-6992 ;ISSN: 1530-6984 ;EISSN: 1530-6992 ;DOI: 10.1021/acs.nanolett.2c01286

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