Radiative heat transfer in nonlinear Kerr media
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PhysRevB.91.115406.pdf
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Author(s)
Khandekar, Chinmay
Pick, Adi
Johnson, Steven G.
Rodriguez, Alejandro W.
Date Issued
March 2015
Journal
Physical Review B
Publisher
American Physical Society
Citation
Khandekar, Chinmay, Adi Pick, Steven G. Johnson, and Alejandro W. Rodriguez. "Radiative heat transfer in nonlinear Kerr media." Phys. Rev. B 91, 115406 (March 2015). © 2015 American Physical Society
Version
Final published version
Abstract
We obtain a fluctuation-dissipation theorem describing thermal electromagnetic fluctuation effects in nonlinear media that we exploit in conjunction with a stochastic Langevin framework to study thermal radiation from Kerr (χ[superscript (3)]) photonic cavities coupled to external environments at and out of equilibrium. We show that, in addition to thermal broadening due to two-photon absorption, the emissivity of such cavities can exhibit asymmetric, non-Lorentzian line shapes due to self-phase modulation. When the local temperature of the cavity is larger than that of the external bath, we find that the heat transfer into the bath exceeds the radiation from a corresponding linear blackbody at the same local temperature. We predict that these temperature-tunable thermal processes can be observed in practical, nanophotonic cavities operating at relatively small temperatures.
MIT Department
Massachusetts Institute of Technology. Department of Mathematics
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.91.115406
