A hyperbolic two-step model based finite difference scheme for studying thermal deformation in a double-layered thin film exposed to ultrashort-pulsed lasers

Hyperbolic two-step micro heat transport equations have attracted attention in thermal analysis of thin metal films exposed to ultrashort-pulsed lasers. In this article, we develop a finite difference scheme for studying thermal deformation in a 2D double-layered micro thin film exposed to ultrashort-pulsed lasers. This scheme is obtained based on the hyperbolic two-step model with temperature-dependent thermal properties coupled with the dynamic equations of motion. The method is illustrated by investigating thermal deformation in a gold layer on a chromium padding layer.