title: Time-resolved spectroscopy of laser emission from dye-doped droplets.
abstract: Micrometer-sized droplets of Rhodamine 6G solution in water and ethanol are irradiated by high-intensity nanosecond pulses from a frequency-doubled Nd:YAG laser. Coupling of the spontaneous fluorescence emission with natural resonant modes of the spherical droplets results in stimulated emission, with each droplet behaving like a laser cavity. Spectral observations suggest that droplet lasing emission is supported by resonances of a single mode order. The emission exhibits faster rise times and is shorter lived than corresponding bulk-liquid fluorescence. Lasing in droplets is generally initiated almost simultaneously with elastic scattering, unlike stimulated Raman scattering, which is significantly delayed.
authors.forename: A
authors.initials: A
authors.lastname: Biswas
authors.forename: H
authors.initials: H
authors.lastname: Latifi
authors.forename: R L
authors.initials: RL
authors.lastname: Armstrong
authors.forename: R G
authors.initials: RG
authors.lastname: Pinnick