Crossref journal-article
ASME International
Journal of Heat Transfer (33)
Abstract

In high temperature and vacuum applications, when heat transfer is predominantly by radiation, the material’s surface texture is of substantial importance. Several micro- and nanostructure designs have been proposed to enhance a material’s emissivity and its radiative coherence, as control of thermal emission is of crucial concern in the design of infrared sources, optical filters, and sensing devices. In this research, an extraordinary coherent thermal emission from an anisotropic microstructure is experimentally and theoretically presented. The enhanced coherency is due to coherent coupling between resonant cavities obtained by surface standing waves, wherein each cavity supports a localized field that is attributed to coupled surface phonon polaritons. We show that it is possible to obtain a polarized quasimonochromatic thermal source from a SiC microstructure with a high quality factor of 600 at the resonant frequency of the cavity and a spatial coherence length of 716 wavelengths, which corresponds to an angular divergence of 1.4mrad. In the experimental results, we measured a quality factor of 200 and a spatial coherence length of 143 wavelengths. We attribute the deviation in the experimental results to imperfections in the fabrication of the high quality factor cavities.

Bibliography

Dahan, N., Niv, A., Biener, G., Gorodetski, Y., Kleiner, V., & Hasman, E. (2008). Extraordinary Coherent Thermal Emission From SiC Due to Coupled Resonant Cavities. Journal of Heat Transfer, 130(11).

Authors 6
  1. Nir Dahan (first)
  2. Avi Niv (additional)
  3. Gabriel Biener (additional)
  4. Yuri Gorodetski (additional)
  5. Vladimir Kleiner (additional)
  6. Erez Hasman (additional)
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Dates
Type When
Created 16 years, 11 months ago (Sept. 5, 2008, 7:41 p.m.)
Deposited 5 years, 10 months ago (Oct. 5, 2019, 5:47 p.m.)
Indexed 1 month ago (July 30, 2025, 8:43 a.m.)
Issued 17 years ago (Sept. 3, 2008)
Published 17 years ago (Sept. 3, 2008)
Published Online 17 years ago (Sept. 3, 2008)
Published Print 16 years, 10 months ago (Nov. 1, 2008)
Funders 0

None

@article{Dahan_2008, title={Extraordinary Coherent Thermal Emission From SiC Due to Coupled Resonant Cavities}, volume={130}, ISSN={1528-8943}, url={http://dx.doi.org/10.1115/1.2955475}, DOI={10.1115/1.2955475}, number={11}, journal={Journal of Heat Transfer}, publisher={ASME International}, author={Dahan, Nir and Niv, Avi and Biener, Gabriel and Gorodetski, Yuri and Kleiner, Vladimir and Hasman, Erez}, year={2008}, month=sep }