Title: High pulsed power laser inducing phase change - chemical transformations. Coupled modeling and analytical chemistry techniques
Abstract:
High power laser interaction with matter is the tool key to both produce and analyse materials in a vast range from metals and oxides to complex polymers and biocomposites, from particulate matter (PM) in the atmosphere to thin films and bulk materials. The quality of the new materials produced by pulsed laser deposition technique involves the physico-chemical transformations and recombinations during laser ablation from ignition to plasma plume expansion and to the deposition. In order to achieve the desired quality, a consistent number of trials would be required until laser parameters specifically optimized. Also, analytical application of high power laser interaction with matter in LIBS (Laser Induced Breakedown Spectroscopy) and LIF (Laser Induced Fluorescence) requires laser parameters optimization as well. This is the gap that numerical simulation in COMSOL Multiphysics can fulfill, reducing the range of trials. And this is not all that a simulation of laser interaction with matter in COMSOL can provide in the context of a complex study. Developing numerical models using a set of variables and formula, analytical functions, parametric sweep, geometric construction with finite element and meshing accordingly to the needs of the study, physical phenomena and chemical reactions are anticipated and/or their occurrence is explained. The achievements of COMSOL numerical assisted analytic chemical spectrometric techniques establish the bases for a new strategy to enhance the benefits of the laser induced phenomena and processes to obtain new materials, to analyze a wide range of chemical compounds and to lead to a better understanding regarding their occurrence and behavior in certain conditions.
