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(Color online) Spectral energy density for GaAs as a function of the distance from the GaAs-vacuum interface at : (a) , (b) , and (c) . While the solid curve is for , the individual contributions from the electric field and the magnetic field are shown by the dashed and dotted curves, respectively. The solid and the dashed curves essentially overlap in the near-field peak.
(Color online) Peak spectral energy density [i.e., evaluated at ] vs for the polar materials under consideration at (a) and (b) .
Comparison of parameters pertaining to the near-field thermal emission spectra for different polar materials at and .
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