Generation of a large compressive strain wave in graphite by ultrashort-pulse laser irradiation

0Citations
Citations of this article
5Readers
Mendeley users who have this article in their library.

Abstract

We have studied strain wave generation in graphite induced by an intense ultrashort laser pulse. The study was performed in the intensity regime above the ablation threshold of graphite. The aim was to maximize the strain and, thus, also the internal pressure (stress). Laser pulses with a 1 ps temporal duration melt the surface of graphite resulting in a molten material which initially exists at the solid density. As the molten material expands, a compressive strain wave starts propagating into the crystal below the molten layer. The strain pulse was studied with time-resolved X-ray diffraction. At a temporal delay of 100 ps after laser excitation, we observed >10% compressive strain, which corresponds to a pressure of 7.2 GPa. This strain could be reproduced by hydrodynamic simulations, which also provided a temperature map as a function of time and depth.

Cite

CITATION STYLE

APA

Wang, X., Jarnac, A., Ekström, J. C., Bengtsson, U. J., Dorchies, F., Enquist, H., … Larsson, J. (2019). Generation of a large compressive strain wave in graphite by ultrashort-pulse laser irradiation. Structural Dynamics, 6(2). https://doi.org/10.1063/1.5089291

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free