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 . 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.
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e-mail: mehasman@tx.technion.ac.il
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November 2008
This article was originally published in
Journal of Heat Transfer
Research Papers
Extraordinary Coherent Thermal Emission From SiC Due to Coupled Resonant Cavities
Nir Dahan,
Nir Dahan
Faculty of Mechanical Engineering, Micro and Nanooptics Laboratory, Russell Berrie Nanotechnology Institute,
Technion-Israel Institute of Technology
, Haifa 32000, Israel
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Avi Niv,
Avi Niv
Faculty of Mechanical Engineering, Micro and Nanooptics Laboratory, Russell Berrie Nanotechnology Institute,
Technion-Israel Institute of Technology
, Haifa 32000, Israel
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Gabriel Biener,
Gabriel Biener
Faculty of Mechanical Engineering, Micro and Nanooptics Laboratory, Russell Berrie Nanotechnology Institute,
Technion-Israel Institute of Technology
, Haifa 32000, Israel
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Yuri Gorodetski,
Yuri Gorodetski
Faculty of Mechanical Engineering, Micro and Nanooptics Laboratory, Russell Berrie Nanotechnology Institute,
Technion-Israel Institute of Technology
, Haifa 32000, Israel
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Vladimir Kleiner,
Vladimir Kleiner
Faculty of Mechanical Engineering, Micro and Nanooptics Laboratory, Russell Berrie Nanotechnology Institute,
Technion-Israel Institute of Technology
, Haifa 32000, Israel
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Erez Hasman
Erez Hasman
Faculty of Mechanical Engineering, Micro and Nanooptics Laboratory, Russell Berrie Nanotechnology Institute,
e-mail: mehasman@tx.technion.ac.il
Technion-Israel Institute of Technology
, Haifa 32000, Israel
Search for other works by this author on:
Nir Dahan
Faculty of Mechanical Engineering, Micro and Nanooptics Laboratory, Russell Berrie Nanotechnology Institute,
Technion-Israel Institute of Technology
, Haifa 32000, Israel
Avi Niv
Faculty of Mechanical Engineering, Micro and Nanooptics Laboratory, Russell Berrie Nanotechnology Institute,
Technion-Israel Institute of Technology
, Haifa 32000, Israel
Gabriel Biener
Faculty of Mechanical Engineering, Micro and Nanooptics Laboratory, Russell Berrie Nanotechnology Institute,
Technion-Israel Institute of Technology
, Haifa 32000, Israel
Yuri Gorodetski
Faculty of Mechanical Engineering, Micro and Nanooptics Laboratory, Russell Berrie Nanotechnology Institute,
Technion-Israel Institute of Technology
, Haifa 32000, Israel
Vladimir Kleiner
Faculty of Mechanical Engineering, Micro and Nanooptics Laboratory, Russell Berrie Nanotechnology Institute,
Technion-Israel Institute of Technology
, Haifa 32000, Israel
Erez Hasman
Faculty of Mechanical Engineering, Micro and Nanooptics Laboratory, Russell Berrie Nanotechnology Institute,
Technion-Israel Institute of Technology
, Haifa 32000, Israele-mail: mehasman@tx.technion.ac.il
J. Heat Transfer. Nov 2008, 130(11): 112401 (5 pages)
Published Online: September 3, 2008
Article history
Received:
October 10, 2007
Revised:
March 26, 2008
Published:
September 3, 2008
Citation
Dahan, N., Niv, A., Biener, G., Gorodetski, Y., Kleiner, V., and Hasman, E. (September 3, 2008). "Extraordinary Coherent Thermal Emission From SiC Due to Coupled Resonant Cavities." ASME. J. Heat Transfer. November 2008; 130(11): 112401. https://doi.org/10.1115/1.2955475
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