Forced Rayleigh Scattering Technology

Forced Rayleigh scattering (FRS) is a light scattering technique used to investigate light-induced grating structures that decay in a relaxational or almost relaxational manner. Such gratings can be created by interference and absorption of two pump beams and probed by a third beam, usually of different frequency. Forced Rayleigh Scattering (FRS) is a powerful technique to study very slow self diffusion coefficients (Ds) of tracers (from small dye molecules to nanoscopic supramolecular particles) in the regime 10−20 m2s−1 < Ds < 10−10 m2s−1.