Stimulated Thermal Rayleigh Scattering in Liquids

Two-photon absorption induced stimulated Rayleigh-Bragg scattering

“…Another less known type of stimulated scattering is the so-called stimulated thermal Rayleigh scattering (STRS) that was observed in linearly (one-photon) absorbing media and was originally attributed to light-induced thermal (temperature) fluctuation. [9][10][11] In this case an unusual * E-mail: gshe@acsu.buffalo.edu feature was the anti-Stokes frequency-shift of the stimulated scattering predicted by the original theory 9 . The predicted frequency-shift value was about a half of the spectral line-width of the pump laser, which was partially proven by the earliest experimental results obtained in I 2 -added solvents (such as CCl 4 ).…”

“…Maybe due to this reason the early effort of using dye solutions as linear absorbing media to observe STRS was unsuccessful. 10,11 Since then, for a long time, no so much research progress on this specific subject has been reported.…”

“…The predicted frequency-shift value was about a half of the spectral line-width of the pump laser, which was partially proven by the earliest experimental results obtained in I 2 -added solvents (such as CCl 4 ). [10][11][12] However, some later experimental results showed no frequency-shift of the backward STRS in the same type of linearly absorbing liquid. 13,14 The another theoretical prediction for STRS was that the gain factor is proportional to the linear absorption coefficient α .…”

Density Dependence in Thermal Rayleigh Scattering in Gases

“…2 This work has been extended to additional liquids and a number of absorbers. 3 The existence of STRS in gases was shown to exist in C0 2 and N 2 using N0 2 and I 2 as absorbing molecules. 4 The distinction between the production of this stimulated scattering in liquids and gases has been discussed by Gray 5 and Gray and Herman.…”

Stimulated scattering effects in gold-nanorod-water samples pumped by 532 nm laser pulses

“…Stimulated light scattering in liquids is an important research topic in physics and chemistry 1 2 3 4 5 . Up to now, stimulated scattering effects have been reported usually in the following types: stimulated Brillouin scattering (SBS) 6 7 , stimulated Raman scattering (SRS) 8 9 , and stimulated Rayleigh scattering (STRS) 10 11 . The nonlinear interaction between the optical field and acoustic phonons is responsible for SBS process: the pump wave generates acoustic wave through the process of electrostriction, and the acoustic wave scatters the pump wave through Bragg diffraction and produces the scattered light at Stokes frequency.…”