title: Stimulated Raman scattering in micrometer-sized droplets: time-resolved measurements.
abstract: Time-resolved measurements of elastic scattering and stimulated Raman scattering (SRS) in micrometer-sized water and carbon tetrachloride droplets irradiated with a pulsed, frequency-doubled Nd:YAG laser (pulse width 8 nsec, lambda = 532 nm, peak intensity ~1 GW cm(-2)) are reported. Elastic scattering of light is instantaneous within our measurement error, estimated to be <+/-3 nsec. On the other hand, the first Stokes shift in water and multiple-order (through ninth-order) Stokes shifts in carbon tetrachloride are delayed from the elastically scattered light by 5-7 nsec. The delay in SRS is apparently a consequence of structure resonances within the droplet, which acts as an optical cavity with relatively high Q. Quasi-periodic peaks in SRS spectra of water droplets are shown to be associated with elastic-scattering structure resonances having the same mode order.
authors.forename: R G
authors.initials: RG
authors.lastname: Pinnick
authors.forename: A
authors.initials: A
authors.lastname: Biswas
authors.forename: P
authors.initials: P
authors.lastname: Chyălek
authors.forename: R L
authors.initials: RL
authors.lastname: Armstrong
authors.forename: H
authors.initials: H
authors.lastname: Latifi
authors.forename: E
authors.initials: E
authors.lastname: Creegan
authors.forename: V
authors.initials: V
authors.lastname: Srivastava
authors.forename: M
authors.initials: M
authors.lastname: Jarzembski
authors.forename: G
authors.initials: G
authors.lastname: Fernández