Analysis of plasma profile over KTiOAsO4 surface produced by 532 and 1064 nm laser radiations

Optical emission studies are carried out on the plasma generated by nanosecond radiation of the 532 and 1064 nm lasers on KTiOAsO4 (KTA) samples with the intensity of 108-109 GW/cm2. Our studies indicate that the amount of evaporated matter in plasma evolution depends on the laser wavelength. The dimension of the self-regulating region shows a clear laser-intensity dependence, which increases from 3 mm at 0.22 GW/cm2 to 8.5 mm at 1.72 GW/cm2. This work is expected be helpful for optimizing the experimental parameters of growing KTA thin films using pulsed laser deposition