= Hyper–Rayleigh scattering
{wiki=Hyper–Rayleigh_scattering}
Hyper-Rayleigh scattering (HRS) is a nonlinear optical phenomenon that involves the scattering of light by molecules. Specifically, it refers to the scattering of light from a medium that exhibits a second-order nonlinear optical response. When a light wave interacts with a material, it can generate new frequencies through the nonlinear interaction of the electromagnetic field with the electronic structure of the molecules in that material.
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