Thermal conductivity of nano-layered systems due to surface phonon-polaritons

Abstract : The effective thermal conductivity of a layered system due to the propagation of surface phonon-polaritons is studied. We analytically demonstrate that the thermal conductivity of a set of nanolayers can be described as one of a single layer with an effective permittivity, which does not ordinarily appear in nature and depends on the permittivities and thicknesses of the individual components. For a two-layer system of SiO 2 and BaF 2 surrounded by air, it is shown that: (i) the propagation length of surfaces phonon-polaritons can be as high as 3.3 cm for a 200 nm-thick system. (ii) The thermal conductivity of the system with total thickness of 50 nm is 3.4 W/mÁK, which is twice that of a single layer of SiO 2 , at 500 K. Higher values are found for higher temperatures and thinner layers. The results show that an ensemble of layers provides more channels than a single layer for the propagation of surface phonon-polaritons and therefore for the enhancement of the thermal conductivity of common polar materials. V C 2014 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4864430]
Type de document :
Article dans une revue
Journal of Applied Physics, American Institute of Physics, 2014, pp.6. 〈10.1063/1.4864430]〉
Liste complète des métadonnées

Littérature citée [15 références]  Voir  Masquer  Télécharger

https://hal-ecp.archives-ouvertes.fr/hal-01134042
Contributeur : Jose Ordonez-Miranda <>
Soumis le : mardi 24 mars 2015 - 15:55:36
Dernière modification le : jeudi 5 avril 2018 - 12:30:06
Document(s) archivé(s) le : mercredi 9 novembre 2016 - 09:47:13

Fichier

JAP.115.054311.pdf
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Citation

Jose Ordonez-Miranda, Laurent Tranchant, Yann Chalopin, Thomas Antoni, Sebastian Volz. Thermal conductivity of nano-layered systems due to surface phonon-polaritons. Journal of Applied Physics, American Institute of Physics, 2014, pp.6. 〈10.1063/1.4864430]〉. 〈hal-01134042〉

Partager

Métriques

Consultations de la notice

261

Téléchargements de fichiers

205