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Theory of thermal emission from periodic structures

Author(s)
Han, Sang Eon
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Abstract
We provide a momentum space formulation for thermal emission from photonic crystals and corroborate Kirchhoff’s law for periodic structures. This formalism allows us to calculate the optical coherence in the far and near fields of photonic crystals. Calculations in the far field show that the exchange of momentum between a linear grating and the surface polaritons can significantly decrease the coherence length for the grating compared to that of a flat surface. Considerations in the near field of photonic crystals show that, unlike observations of flat surfaces, the electric energy density does not necessarily decrease as 1/z[superscript 3] for a distance z from the surface.
Date issued
2009-10
URI
http://hdl.handle.net/1721.1/52485
Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Journal
Physical Review B
Publisher
American Physical Society
Citation
Han, S. E. “Theory of thermal emission from periodic structures.” Physical Review B 80.15 (2009): 155108. © 2009 The American Physical Society
Version: Final published version
ISSN
1550-235X
1098-0121

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