TY  - JOUR
A1  - Greffet, Jean-Jacques
A1  - Carminati, Rémi
A1  - Joulain, Karl
A1  - Mulet, J. P.
A1  - Henkel, Carsten
A1  - Mainguy, S.
T1  - Coherent spontaneous emission of light due to surface waves
Y1  - 2003
SN  - 0303-4216
ER  - 
TY  - JOUR
A1  - Greffet, Jean-Jacques
A1  - Carminati, Rémi
A1  - Joulain, Karl
A1  - Mulet, J. P.
A1  - Henkel, Carsten
T1  - Coherence properties of thermal near fields : implications for nanometer-scale radiative transfer
N2  - With the recent development of local (optical and thermal) probe microscopy and the advent of nanotechnology, it seems necessary to revisit the old subject of coherence properies of thermal sources of light. Concerning temporal coherence, we show that thermal sources may produce quasi-monochromatic near fields. In light of this result, the possibility of perfoming near-field solid-state spectroscopy and of designing near-field infrared sources is discussed. The problem of radiative transfer between two thermal sources held at subwavelength distance is studied. The radiative flux may be enhanced by several orders of magnitude due to the excitation of resonant surface waves, and this may occur at particular frequencies. Finally, we study the spatial coherence of thermal sources and the substantial influence of the near field. Surface waves may induce long-range spatial correlation, on a scale much larger than the wavelength. Conversely, quasi-static contributions, as well as skin-layer currents, induce arbitary small correlations. With the recent development of local (optical and thermal) probe microscopy and the advent of nanotechnology, it seems necessary to revisit the old subject of coherence of thermal fields.
Y1  - 2001
ER  - 
TY  - JOUR
A1  - Henkel, Carsten
A1  - Joulain, Karl
A1  - Carminati, Rémi
A1  - Greffet, Jean-Jacques
T1  - Spatial coherence of thermal near fields
N2  - We analyze the spatial coherence of the electromagnetic field emitted by a half-space at temperature T close to the interface. An asymptotic analysis allows to identify three different contributions to the cross-spectral density tensor in the near-field regime. It is shown that the coherence length can be either much larger or much shorter than the wavelength depending on the dominant contribution.
Y1  - 2000
ER  -