Research
Plan: The study is based on the simultaneous
experimental and numerical investigations of of ultrashort laser
material interaction. The experimental
investigations
are being carried out using a Spectra Physics femtosecond laser (Spectra
Physics, Spitfire Pro: 1mJ, 800nm, 1 kHz, 100 fs) and a Lumera
picosecond laser (2W, 500kHz, 10 ps, 532 nm, 1064 nm).
Various beam delivery mechanisms and diagnostics instruments are used
with these set-ups. Modeling
efforts include an atomistic modeling approach based on molecular
dynamics-Monte Carlo method, multi-physics hydrodynamic models for
prediction of material ablation and plasma evolution, and
two-temperature models to predict ablation depth. These models are
supplemented by the in-house developed Quotidian Equations of State (QEOS)
for calculation of requisite properties. At the same time, various
novel applications utilizing ultrafast lasers are being explored.
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