A Green function approach is used with the fluctuation-dissipation theorem to develop a qualitative theoretical model of radiation heat transfer across an evacuated microscale spherical geometry bounded by silicon carbide. The appropriate scalar Green function is presented by employing an impedance boundary condition to describe the electromagnetic spherical interface condition and thus capture the surface modes. This work shows that the spherical boundary can result in spectral conditions for surface mode excitation that depend not only on the dielectric function, but on the sphere radius as well. The surface modes are shown to enhance the radiation significantly and are attributed to surface phonon polariton modes excited at the interface, and surface modes excited by the mechanism of total internal reflection.
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Thermal Radiative Transport Enhancement via Electromagnetic Surface Modes in Microscale Spherical Regions Bounded by Silicon Carbide
James S. Hammonds, Jr.
James S. Hammonds, Jr.
Department of Mechanical Engineering,
e-mail: hammonds@ccny.cuny.edu
The City College of New York
, New York, NY 10031
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James S. Hammonds, Jr.
Department of Mechanical Engineering,
The City College of New York
, New York, NY 10031e-mail: hammonds@ccny.cuny.edu
J. Heat Transfer. Jan 2007, 129(1): 94-97 (4 pages)
Published Online: July 24, 2006
Article history
Received:
January 15, 2006
Revised:
July 24, 2006
Citation
Hammonds, J. S., Jr. (July 24, 2006). "Thermal Radiative Transport Enhancement via Electromagnetic Surface Modes in Microscale Spherical Regions Bounded by Silicon Carbide." ASME. J. Heat Transfer. January 2007; 129(1): 94–97. https://doi.org/10.1115/1.2401203
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