Thin 10–100 nm film in contact with substrate: Dynamics after femtosecond laser irradiation. (October 2015)

• Record Type: Journal Article
• Authors: Khokhlov, V A; Inogamov, N A; Zhakhovsky, V V; Shepelev, V V; Il'nitsky, D K
• Is Part Of: Journal of physics. Number 653(2015)
• Publication Date: 2015-10
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/653/1/012003
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: Femtosecond laser irradiation of a thin gold film deposited on the thick glass substrate is considered. The thickness of a film has the order of a few microns and focal focal spot is small. Underlying physics of processes after irradiation is studied with combined approach of two-temperature hydrodynamic and MD simulations. Found are two adsorbed fluence thresholds Fs < Fa and three regimes of motion, in comparison with the freestanding film. There is oscillatory mode when the film oscillates remaining on substrate for 0 < F < Fs . For Fs < F < Fa the film breaks away from substrate because negative pressure overcomes the cohesion strength of the film-substrate contact. For Fa < F there is inner disruption of the film happened before the separation of metal from dielectric substrate.