Jd. Eversole et al., INPUT-OUTPUT RESONANCE CORRELATION IN LASER-INDUCED EMISSION FROM MICRODROPLETS, Journal of the Optical Society of America. B, Optical physics, 12(2), 1995, pp. 287-296
An experimental investigation of the effect of access to different res
onant modes by pump laser radiation (input modes) on fluorescent emiss
ion spectra was performed on ethanol microdroplets. The droplets, cont
aining approximate to 2 x 10(-7) M concentration of Rhodamine 6G dye a
s a fluorophor, were generated as a monodisperse stream with continuou
sly variable sizes from approximate to 6.5 to 6.6 mu m in radius. This
range of droplet size permitted Ar+ laser pump radiation (514.5 nm) t
o become resonant with the droplet for both TE and TM modes of orders
1-4. Emission spectra from 530 to 585 nm were obtained for each of the
resolved input resonances. The results clearly show higher relative i
ntensities in emission modes that have the same mode order as the pump
radiation resonance. Convolution integrals of radial profiles of the
input and output modes are consistent with the general pattern of obse
rved spectral intensities.