title: Experimental observation of stimulated low-frequency Raman scattering in water suspensions of silver and gold nanoparticles.
abstract: In this Letter we report on experimental observation of stimulated low-frequency Raman scattering (SLFRS) in gold and silver nanoparticle suspensions excited by 20 ns ruby laser pulses, SLFRS propagated in forward and backward directions with a maximum conversion efficiency up to 20%. Frequency shift for silver nanoparticle suspension was found to be 0.33 THz and for gold nanoparticle suspension 0.435 THz. This type of stimulated scattering of light can be used as an effective source of biharmonic pumping for solving a large number of practical tasks.
authors.affiliation: P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia.
authors.forename: N V
authors.initials: NV
authors.lastname: Tcherniega
authors.forename: K I
authors.initials: KI
authors.lastname: Zemskov
authors.forename: V V
authors.initials: VV
authors.lastname: Savranskii
authors.forename: A D
authors.initials: AD
authors.lastname: Kudryavtseva
authors.forename: A Y
authors.initials: AY
authors.lastname: Olenin
authors.forename: G V
authors.initials: GV
authors.lastname: Lisichkin