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International Heat Transfer Conference 12

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

Design of coherent thermal sources of radiation

Jean-Jacques Greffet
Laboratoire d'Energétique Moléculaire et Macroscopique, Combustion, CNRS UPR 288, Ecole Centrale Paris, Grande Voie des Vignes, F-92295 Châtenay-Malabry cedex, France

Remi Carminati
Laboratoire d'Énergétique Moléculaire et Macroscopique, Combustion École Centrale Paris, 92295 Châtenay-Malabry Cedex, France

Karl Joulain
Institut Pprime, CNRS-Université de Poitiers-ENSMA, Département Fluides, Thermique, Combustion, ESIP-Batiment de mécanique, France

Francois Marquier
Laboratoire d'Energétique Moléculaire et Macroscopique, Combustion; Ecole Centrale Paris, Centre National de la Recherche Scientifique, 92295 Chatenay-Malabry Cedex, France

J. P. Mulet
Laboratoire d'Énergétique Moléculaire et Macroscopique, Combustion École Centrale Paris, 92295 Châtenay-Malabry Cedex, France

S. Mainguy
Commissariat a l'Energie Atomique, Groupe Optique, 33114 Le Barp, France

Y. Chen
Laboratoire de photonique et de nanostructures, CNRS, av. H. Ravera 92220 Bagneux, France

DOI: 10.1615/IHTC12.3930
6 pages

Abstract

We show that is possible to design coherent thermal sources of infrared light by ruling a grating on a plane surface of a polar material such as glass, SiC or III-V and II-VI semiconductors. Two types of sources with unusual properties are presented. Firstly, we have fabricated a thermal source whose spectrum is quasi-monochromatic and depends on the direction of observation, and whose emission at a given frequence is highly directional. This thermal source exhibits a high degree of temporal and spatial coherence. Secondly, we have designed partially coherent sources which radiate with a quasi-monochromatic spectrum for all angles in a plane perpendicular to the grooves. These results show that thermal emission of light by surfaces may be controlled in order to produce new types of infrared sources.

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