Polarization-resolved measurements of picosecond laser-ablated plumes.

Authors :: Sharma, A. K.
Thareja, R. K.
Source :: Journal of Applied Physics. 8/1/2005, Vol. 98 Issue 3, p033304. 5p. 3 Diagrams, 6 Graphs.
Publication Year :: 2005
Abstract: We discuss the ablation of aluminum plasma using picosecond pulsed laser in vacuum and in ambient atmosphere of nitrogen. The plume dynamics of picosecond and nanosecond laser-ablated plumes in ambient atmosphere is discussed. The degree of polarization is measured using optical emission spectroscopy for the Al III transition 4s 2S1/2-4p 2P3/2o at 569.6 nm. Strong anisotropy is observed using picosecond laser pulse as compared to nanosecond laser pulse. [ABSTRACT FROM AUTHOR]