Date:

2025-04-30

Title of Paper:

Atomistic modeling of electron relaxation effect on femtosecond laser-induced thermoelastic response of gold films

Journal:

Journal of applied Physics

Summary:

The thermoelastic response of thin gold films induced by femtosecond laser irradiation is
numerically simulated using a modified combined two-temperature model (TTM) and molecular
dynamics (MD) method, with focus placed upon the influence of the electron relaxation effect.
The validity of the numerical approach is checked against existing experimental results. While the
electron relaxation effect is found negligible when the laser duration is much longer than the
electron thermal relaxation time, it becomes significant if the laser duration matches the electron
relaxation time, especially when the former is much shorter than the latter. The characteristics
of thermo-mechanical interaction in the thin film are analyzed, and the influence of temperaturedependent
material properties upon the thermoelastic response of the film quantified.

Co-author:

QL Xiong, XG Tian, TJ Lu

Volume:

112(3):

Page Number:

024313

Translation or Not:

No

Date of Publication:

2012-08-08