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dc.contributor.authorFrancoeur, M.
dc.contributor.authorMengüç, Mustafa Pınar
dc.contributor.authorVaillon, R.
dc.date.accessioned2012-08-16T06:13:00Z
dc.date.available2012-08-16T06:13:00Z
dc.date.issued2011
dc.identifier.issn1098-0121
dc.identifier.urihttp://hdl.handle.net/10679/238
dc.identifier.urihttp://journals.aps.org/prb/abstract/10.1103/PhysRevB.84.075436
dc.description.abstractWe 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.sponsorshipEuropean Commission
dc.language.isoengen_US
dc.publisherAmerican Physical Societyen_US
dc.relationinfo:eu-repo/grantAgreement/EC/FP7/239382en_US
dc.relation.ispartofPhysical Review B
dc.rightsrestrictedAccess
dc.titleCoexistence of multiple regimes for near-field thermal radiation between two layers supporting surface phonon polaritons in the infrareden_US
dc.typeArticleen_US
dc.peerreviewedyesen_US
dc.publicationstatuspublisheden_US
dc.contributor.departmentÖzyeğin University
dc.contributor.authorID(ORCID 0000-0001-5483-587X & YÖK ID 141825) Mengüç, Pınar
dc.contributor.ozuauthorMengüç, Mustafa Pınar
dc.identifier.volume84
dc.identifier.issue7
dc.identifier.startpage075436-1
dc.identifier.endpage075436-9
dc.identifier.wosWOS:000293618900021
dc.identifier.doi10.1103/PhysRevB.84.075436
dc.subject.keywordsNear-field thermal radiation regimesen_US
dc.identifier.scopusSCOPUS:2-s2.0-80052479994
dc.contributor.authorMale1


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