Coexistence of multiple regimes for near-field thermal radiation between two layers supporting surface phonon polaritons in the infrared
dc.contributor.author | Francoeur, M. | |
dc.contributor.author | Mengüç, Mustafa Pınar | |
dc.contributor.author | Vaillon, R. | |
dc.date.accessioned | 2012-08-16T06:13:00Z | |
dc.date.available | 2012-08-16T06:13:00Z | |
dc.date.issued | 2011 | |
dc.identifier.issn | 1098-0121 | |
dc.identifier.uri | http://hdl.handle.net/10679/238 | |
dc.identifier.uri | http://journals.aps.org/prb/abstract/10.1103/PhysRevB.84.075436 | |
dc.description.abstract | We demonstrate the coexistence of different near-field thermal radiation regimes between two layers supporting surface phonon polaritons (SPhPs) in the infrared. These regimes existwhen the distance of separation between the media d is much smaller than the dominant emission wavelength. This coexistence is noticed after computations of the near-field radiative heat transfer coefficient hr for silicon carbide films using fluctuational electrodynamics and following an asymptotic analysis of hr . We show that the emergence of these regimes is a function of a dimensionless variable D defined as the ratio of the layer thickness t to d. When D _ 1 for both films, SPhPs dominating near-field radiant energy exchange do not couple within the layers, such that hr follows a d−2 power law as for the case of two planar half-spaces.When D_1 for both layers, the dominant SPhPs couple within the films, thus resulting in a splitting of the spectral distribution of flux into two distinct modes. Despite this splitting, the asymptotic expansion reveals that hr varies as d−2 due to the fact that the spectral bands of high emission and absorption are essentially the same for both films. However, when both layers have a thickness of the order of a nanometer or less, a purely theoretical regime emerges where hr follows a d−4 asymptote. Also, when one layer has D _ 1 while the other one is characterized by D _ 1, there is an important mismatch between the spectral bands of high emission and absorption of the films, thus resulting in a hr varying as d−3. These various near-field thermal radiation regimes are finally summarized in a comprehensive regime map. This map provides a clear understanding of near-field thermal radiation regimes between two layers, which are particularly important for designing highly efficient nanoscale-gap thermophotovoltaic power generation devices. | en_US |
dc.description.sponsorship | European Commission | |
dc.language.iso | eng | en_US |
dc.publisher | American Physical Society | en_US |
dc.relation | info:eu-repo/grantAgreement/EC/FP7/239382 | en_US |
dc.relation.ispartof | Physical Review B | |
dc.rights | restrictedAccess | |
dc.title | Coexistence of multiple regimes for near-field thermal radiation between two layers supporting surface phonon polaritons in the infrared | en_US |
dc.type | Article | en_US |
dc.peerreviewed | yes | en_US |
dc.publicationstatus | published | en_US |
dc.contributor.department | Özyeğin University | |
dc.contributor.authorID | (ORCID 0000-0001-5483-587X & YÖK ID 141825) Mengüç, Pınar | |
dc.contributor.ozuauthor | Mengüç, Mustafa Pınar | |
dc.identifier.volume | 84 | |
dc.identifier.issue | 7 | |
dc.identifier.startpage | 075436-1 | |
dc.identifier.endpage | 075436-9 | |
dc.identifier.wos | WOS:000293618900021 | |
dc.identifier.doi | 10.1103/PhysRevB.84.075436 | |
dc.subject.keywords | Near-field thermal radiation regimes | en_US |
dc.identifier.scopus | SCOPUS:2-s2.0-80052479994 | |
dc.contributor.authorMale | 1 | |
dc.relation.publicationcategory | Article - International Refereed Journal - Institutional Academic Staff |
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