Surface waves have been shown to play a key role in spontaneous thermal emission in the near-field as well as the coherence and the polarization properties of the nonradiative field. The near-field coherence of the delocalized nonradiative surface waves can be transferred into radiative fields by introducing a shallow grating on the surface. We show that the coherency of the thermal radiation can be enhanced by an order of magnitude compared with the coherency imposed by the delocalized surface waves. The enhanced coherency is due to coherent coupling between resonant cavities obtained by surface standing waves, where each cavity supports localized field that is attributed to coupled surface waves. We realized coupled resonant cavity structure on amorphous SiO2 and crystalline SiC, both support surface phonon-polaritons, to demonstrate extraordinary coherent thermal emission with a high quality factor of 600 and a spatial coherence length of 760λ.
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ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis
July 7–9, 2008
Haifa, Israel
Conference Sponsors:
- International
ISBN:
978-0-7918-4838-8
PROCEEDINGS PAPER
Enhanced Coherency of Thermal Emission From SiC by Coupled Resonant Cavity Structure Available to Purchase
Nir Dahan,
Nir Dahan
Technion-Israel Institute of Technology, Haifa, Israel
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Avi Niv,
Avi Niv
Technion-Israel Institute of Technology, Haifa, Israel
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Yuri Gorodetski,
Yuri Gorodetski
Technion-Israel Institute of Technology, Haifa, Israel
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Vladimir Kleiner,
Vladimir Kleiner
Technion-Israel Institute of Technology, Haifa, Israel
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Erez Hasman
Erez Hasman
Technion-Israel Institute of Technology, Haifa, Israel
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Nir Dahan
Technion-Israel Institute of Technology, Haifa, Israel
Avi Niv
Technion-Israel Institute of Technology, Haifa, Israel
Yuri Gorodetski
Technion-Israel Institute of Technology, Haifa, Israel
Vladimir Kleiner
Technion-Israel Institute of Technology, Haifa, Israel
Erez Hasman
Technion-Israel Institute of Technology, Haifa, Israel
Paper No:
ESDA2008-59026, pp. 363-367; 5 pages
Published Online:
July 6, 2009
Citation
Dahan, N, Niv, A, Gorodetski, Y, Kleiner, V, & Hasman, E. "Enhanced Coherency of Thermal Emission From SiC by Coupled Resonant Cavity Structure." Proceedings of the ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. Volume 4: Fatigue and Fracture; Fluids Engineering; Heat Transfer; Mechatronics; Micro and Nano Technology; Optical Engineering; Robotics; Systems Engineering; Industrial Applications. Haifa, Israel. July 7–9, 2008. pp. 363-367. ASME. https://doi.org/10.1115/ESDA2008-59026
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