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- Title
Non-Fourier Estimate of Electron Temperature in Case of Femtosecond Laser Pulses Interaction with Metals.
- Authors
Bucă, Anca M.; Oane, Mihai; Mahmood, Muhammad Arif; Mihăilescu, Ion N.; Popescu, Andrei C.; Sava, Bogdan A.; Ristoscu, Carmen
- Abstract
This work is devoted to the electron temperature variation in metals through interaction with femtosecond laser pulses. Our study was inspired by the last mathematical breakthroughs regarding the exact analytical solutions of the heat equation in the case of flash laser-matter interaction. To this purpose, the classical Anisimov's two temperature model was extended via the 3D telegraph Zhukovsky equation. Based upon this new approach, the computational plots of electron thermal fields during the first laser pulse interaction with a gold surface were inferred. It is shown that relaxation times and coupling factors over electron thermal conductivities (g/K) govern the interaction between the laser pulse and metal sample during the first picoseconds. The lower the factor g/K, the higher the electron temperature becomes. In contrast, the lower the relaxation time, the lower the electron temperature.
- Subjects
ELECTRON temperature; THERMAL electrons; FEMTOSECOND pulses; THERMAL conductivity; LASER pulses; ULTRASHORT laser pulses; HEAT equation
- Publication
Metals (2075-4701), 2020, Vol 10, Issue 5, p606
- ISSN
2075-4701
- Publication type
Article
- DOI
10.3390/met10050606