In preparation of his PhD thesis, our group member MSc. Krystof Hlinomaz has published in the International Journal of Heat and Mass Transfer (Elsevier, IF 5.5).
The paper establishes an efficient description of damage of lossy metallic films deposited on substrates upon interaction with femtosecond and picosecond laser pulses. The results are demonstrating the role of the choice of substrate, and of the choice of film thickness on the film and substrate modification dynamics.
In comparison to existing studies,
- this work explores a wide range of sample parameters using high power computing,
- it provides a predictive and robust model benchmarked using several types of validation:
- a validation of simplified cases on analytical solutions,
- a real-time monitoring of the energy conservation of the non-linear system,
- a validation by direct comparison with well established experimental results of the literature.
The work is useful for improving the precision of laser processing of thin metallic films using femtosecond and picosecond laser pulses.
Title of the study is: “Modeling thermal response of Mo thin films upon single femtosecond laser irradiation: dynamics of film melting and substrate softening”
The paper is available here: 10.1016/j.ijheatmasstransfer.2022.123292.