Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5430827 | Journal of Quantitative Spectroscopy and Radiative Transfer | 2007 | 9 Pages |
Abstract
Following Greffet et al. [Coherent emission of light by thermal sources. Nature 2002;416:61-4], we study in this article, the possibility to engineer thermal coherent sources with waveguides. The idea is to rule a grating on a waveguide made of a slice of germanium deposited on a participating media such as glass. The guided waves, thermally excited are coupled to the far field by the grating and increase the system emissivity in certain directions and wavelengths. We numerically compute the diffraction of a plane wave by the grating by a rigorous coupled waves algorithm (RCWA). The reflected, transmitted and absorbed energy calculated allows to obtain the system emissivity by means of the Kirchhoff law.
Related Topics
Physical Sciences and Engineering
Chemistry
Spectroscopy
Authors
Karl Joulain, Alexandre Loizeau,