Quantum nonlinear mixing of thermal photons to surpass the blackbody limit.

@article{Khandekar2020QuantumNM,
  title={Quantum nonlinear mixing of thermal photons to surpass the blackbody limit.},
  author={Chinmay Khandekar and Li-Ping Yang and Alejandro W. Rodriguez and Zubin Jacob},
  journal={Optics express},
  year={2020},
  volume={28 2},
  pages={
          2045-2059
        }
}
Nearly all thermal radiation phenomena involving materials with linear response can be accurately described via semi-classical theories of light. Here, we go beyond these traditional paradigms to study a nonlinear system that, as we show, requires quantum theory of damping. Specifically, we analyze thermal radiation from a resonant system containing a χ(2) nonlinear medium and supporting resonances at frequencies ω1 and ω2 ≈ 2ω1, where both resonators are driven only by intrinsic thermal… 

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