Enhancement of thermal emission and control of its direction are important for applications in optoelectronics and energy conversion. A number of structures have been proposed as coherent emission sources, which exhibit a large emissivity peak within a narrow wavelength band and at a well-defined direction. A commonly used structure is the grating, in which the excited surface polaritons or surface waves are coupled with propagating waves in air, resulting in coherent emission for polarization only. One-dimensional photonic crystals can also support surface waves and may be modified to construct coherent emission sources. The present study investigates coherent emission from a multilayer structure consisting of a film coated atop a dielectric photonic crystal (PC). By exciting surface waves at the interface between and the PC, coherent emission is predicted for both and polarizations. In addition to the excitation of surface waves, the emission from the proposed multilayer structure can be greatly enhanced by the cavity resonance mode and the Brewster mode.
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Coherent Thermal Emission From Modified Periodic Multilayer Structures
B. J. Lee,
B. J. Lee
George W. Woodruff School of Mechanical Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332
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Z. M. Zhang
Z. M. Zhang
Fellow ASME
George W. Woodruff School of Mechanical Engineering,
e-mail: zzhang@me.gatech.edu
Georgia Institute of Technology
, Atlanta, GA 30332
Search for other works by this author on:
B. J. Lee
George W. Woodruff School of Mechanical Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332
Z. M. Zhang
Fellow ASME
George W. Woodruff School of Mechanical Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332e-mail: zzhang@me.gatech.edu
J. Heat Transfer. Jan 2007, 129(1): 17-26 (10 pages)
Published Online: April 5, 2006
Article history
Received:
November 6, 2005
Revised:
April 5, 2006
Citation
Lee, B. J., and Zhang, Z. M. (April 5, 2006). "Coherent Thermal Emission From Modified Periodic Multilayer Structures." ASME. J. Heat Transfer. January 2007; 129(1): 17–26. https://doi.org/10.1115/1.2401194
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