A Raman medium coupled to a single cavity mode scatters photons at different frequencies, indicating the existence of a parametric Raman polariton.

From the article:

Equilibrium Parametric Amplification in Raman-Cavity Hybrids
H. P. Ojeda Collado, Marios H. Michael, Jim Skulte, Angel Rubio, and Ludwig Mathey
Phys. Rev. Lett. 133, 116901 (2024)

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