
April 24, 2014 17:29 PSP Book - 9in x 6in 03-Rashid-A.-Ganeev-c03
70 Low-Order Harmonic Generation in Plasma Plumes
materials to act as the nonlinear media in HG processes. On the
other hand, it can be considered as a diagnostic tool for the
characterization of species present in the ablation plasma through
the spatiotemporal study of the emitted harmonics [11–13, 24].
Optical emission spectroscopy (OES) is a well suited technique to
investigate the composition of laser-induced plasmas; however, it
usually provides information restricted to that derived from the
emission of atoms and small molecules. Higher mass species, such as
clusters and nanoparticles, ...