Thermal heat radiation, near-field energy density and near-field radiative heat transfer of coated materials
Institut für Physik, Carl von Ossietzky Universität, 26111 Oldenburg, Germany
Corresponding author: a email@example.com
Published online: 22 September 2007
We investigate the thermal radiation and thermal near-field energy density of a metal-coated semi-infinite body for different substrates. We show that the surface polariton coupling within the metal coating leads to an enhancement of the TM-mode part of the thermal near-field energy density when a polar substrate is used. In this case the result obtained for a free standing metal film is retrieved. In contrast, in the case of a metal substrate there is no enhancement in the TM-mode part, as can also be explained within the framework of surface plasmon coupling within the coating. Finally, we discuss the influence of the enhanced thermal energy density on the near-field radiative heat transfer between a simple semi-infinite and a coated semi-infinite body for different material combinations.
PACS: 44.40.+a – Thermal radiation / 78.66.-w – Optical properties of specific thin films / 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 41.20.Jb – Electromagnetic wave propagation; radiowave propagation
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007