K
Karl Joulain
Researcher at University of Poitiers
Publications - 154
Citations - 8532
Karl Joulain is an academic researcher from University of Poitiers. The author has contributed to research in topics: Heat transfer & Radiative transfer. The author has an hindex of 40, co-authored 151 publications receiving 7363 citations. Previous affiliations of Karl Joulain include Centre national de la recherche scientifique & École nationale supérieure de mécanique et d'aérotechnique.
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Journal ArticleDOI
Coherent emission of light by thermal sources
Jean-Jacques Greffet,Jean-Jacques Greffet,Rémi Carminati,Karl Joulain,Jean-Philippe Mulet,S. Mainguy,Yong Chen +6 more
TL;DR: It is demonstrated that by introducing a periodic microstructure into such a polar material (SiC) a thermal infrared source can be fabricated that is coherent over large distances (many wavelengths) and radiates in well defined directions.
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Surface electromagnetic waves thermally excited: Radiative heat transfer, coherence properties and Casimir forces revisited in the near field
TL;DR: In this article, the influence of surface waves on the thermally excited electromagnetic field is discussed. And the authors introduce the fluctuation-dissipation theorem that allows to model the fluctuating electromagnetic fields.
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Thermal radiation scanning tunnelling microscopy
Yannick De Wilde,F. Formanek,Rémi Carminati,Boris Gralak,Paul-Arthur Lemoine,Karl Joulain,Jean-Philippe Mulet,Jean-Philippe Mulet,Yong Chen,Jean-Jacques Greffet +9 more
TL;DR: An infrared NSOM that operates without any external illumination is described: it is a near-field analogue of a night-vision camera, making use of the thermal infrared evanescent fields emitted by the surface, and behaves as an optical scanning tunnelling microscope.
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Enhanced radiative heat transfer at nanometric distances
TL;DR: In this paper, the radiative heat transfer between two semi-infinite bodies at subwavelength scale was studied and it was shown that this transfer can be enhanced by several orders of magnitude when the surfaces support resonant surface waves.
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Definition and measurement of the local density of electromagnetic states close to an interface
TL;DR: In this article, an unambiguous definition of the local density of electromagnetic states (LDOS) in a vacuum near an interface in equilibrium at temperature T was proposed, which depends only on the electric-field Green function of the system but does not reduce in general to the trace of its imaginary part, as often is used in the literature.