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arXiv · 1406.4074

Radiative heat transfer in nonlinear Kerr media

Chinmay Khandekar·Adi Pick·Steven G. Johnson·Alejandro W. Rodriguez
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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 ($χ^{(3)}$) photonic cavities coupled to external environments at and out of equilibrium. We show that that in addition to thermal broadening due to two-photon absorption,the emissivity of such cavities can exhibit asymmetric,non-Lorentzian lineshapes 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 black body 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.

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Chinmay Khandekar, Adi Pick, Steven G. Johnson, Alejandro W. Rodriguez. 2015-02-24. Radiative heat transfer in nonlinear Kerr media. https://doi.org/10.1103/physrevb.91.115406

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