Plasma spectra resulting from the irradiation of single, optically levitated glycerine droplets by an intense pulse from a Nd:YAG laser are presented. The temporal development of the plasma is studied by observing emission lines of neutral and once-ionized carbon and of once-ionized nitrogen. Stark shifts of the neutral-carbon lines are used to compute the plasma electron density. The droplet data are compared with similar data for laser-induced breakdown on a graphite surface.
© 1987 Optical Society of America
A. Biswas, H. Latifi, P. Shah, L. J. Radziemski, and R. L. Armstrong, "Time-resolved spectroscopy of plasmas initiated on single, levitated aerosol droplets," Opt. Lett. 12, 313-315 (1987)