Heat radiation of artificial materials
Heat radiation emitted by a medium with a given temperature depends on its material properties, and on its geometry as well. Artificial materials such as nanoporous media, photonic crystals, meta-materials or hyperbolic media feature very unusual optical properties, because of the combined effect of the properties of the respective material itself and of its geometrical structure. For example, by drilling nanoscale holes into a SiC or Au slab, or by ruling a nanoscale grating onto a SiC or Au surface, one can change the optical properties dramatically. This change, in its turn, can enhance or inhibit the heat flow caused by thermal radiation between such media. Therefore, artificial materials allow one to taylor the heat flux. We are investigating not only how the heat flux at the nanoscale can be controlled by such structures, but we also try to give an answer to a much more fundamental question: How does a black body for nanoscale heat radiation look like? And is it possible to artifically manufacture a black body for near-field heat radiation?
- Svend-Age Biehs, Felipe S. S. Rosa, Philippe Ben-Abdallah, Karl Joulain, and Jean-Jacques Greffet:
Nanoscale heat flux between nanoporous materials.
Opt. Expr. Vol. 19, A1088-A1103 (2011).
- Svend-Age Biehs, Felipe S. S. Rosa, and Philippe Ben-Abdallah:
Modulation of near-field heat transfer between two gratings.
Appl. Phys. Lett. 98, 243102 (2011).
- Svend-Age Biehs, Philippe Ben-Abdallah, and Felipe S. S. Rosa:
Nanoscale radiative heat transfer and its applications.
chapter 1 in Infrared Radiation (ISBN 979-953-307-349-0), Vasyl Morozhenko (ed.), InTech.
- Svend-Age Biehs, Maria Tschikin, and Philippe Ben-Abdallah:
Hyperbolic Metamaterials as an Analog of a Blackbody in the Near Field.
Phys. Rev. Lett. 109, 104301 (2012).