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O: Fachverband Oberflächenphysik

O 3: Plasmonics and nanooptics I

O 3.9: Vortrag

Montag, 26. März 2012, 12:30–12:45, MA 005

Nanoscale heat flux for hyperbolic materials — •Svend-Age Biehs and Maria Tschikin — Institut für Physik, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg

We consider the radiative heat flux between two hyperbolic media for distances much smaller than the thermal wavelength. Based on a generalization of the heat flux expression derived by Polder and van Hove for anisotropic media we study the influence of so called hyperbolic modes by using a Maxwell-Garnett effective medium description for the material properties. In particular, we will show that these modes give a maximal transmission over a broad band of frequencies and for large lateral wave vectors due to photon tunneling. We demonstrate that the heat flux associated with these modes can be very close to the fundamental limit derived by P. Ben-Abdallah and K. Joulain at the nanoscale. Hence, hyperbolic materials can be considered as very good candidates for realizing a black body in the near-field regime.