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

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 tempo...

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Autores principales: Wang, Xiaocui, Jarnac, A., Ekström, J. C., Bengtsson, Å. U. J., Dorchies, F., Enquist, H., Jurgilaitis, A., Pedersen, M. N., Tu, C.-M., Wulff, M., Larsson, J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Crystallographic Association 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6422787/
https://www.ncbi.nlm.nih.gov/pubmed/30915389
http://dx.doi.org/10.1063/1.5089291
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author Wang, Xiaocui
Jarnac, A.
Ekström, J. C.
Bengtsson, Å. U. J.
Dorchies, F.
Enquist, H.
Jurgilaitis, A.
Pedersen, M. N.
Tu, C.-M.
Wulff, M.
Larsson, J.
author_facet Wang, Xiaocui
Jarnac, A.
Ekström, J. C.
Bengtsson, Å. U. J.
Dorchies, F.
Enquist, H.
Jurgilaitis, A.
Pedersen, M. N.
Tu, C.-M.
Wulff, M.
Larsson, J.
author_sort Wang, Xiaocui
collection PubMed
description 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.
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spelling pubmed-64227872019-03-26 Generation of a large compressive strain wave in graphite by ultrashort-pulse laser irradiation Wang, Xiaocui Jarnac, A. Ekström, J. C. Bengtsson, Å. U. J. Dorchies, F. Enquist, H. Jurgilaitis, A. Pedersen, M. N. Tu, C.-M. Wulff, M. Larsson, J. Struct Dyn Articles 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. American Crystallographic Association 2019-03-18 /pmc/articles/PMC6422787/ /pubmed/30915389 http://dx.doi.org/10.1063/1.5089291 Text en © 2019 Author(s). 2329-7778/2019/6(2)/024501/5 All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Articles
Wang, Xiaocui
Jarnac, A.
Ekström, J. C.
Bengtsson, Å. U. J.
Dorchies, F.
Enquist, H.
Jurgilaitis, A.
Pedersen, M. N.
Tu, C.-M.
Wulff, M.
Larsson, J.
Generation of a large compressive strain wave in graphite by ultrashort-pulse laser irradiation
title Generation of a large compressive strain wave in graphite by ultrashort-pulse laser irradiation
title_full Generation of a large compressive strain wave in graphite by ultrashort-pulse laser irradiation
title_fullStr Generation of a large compressive strain wave in graphite by ultrashort-pulse laser irradiation
title_full_unstemmed Generation of a large compressive strain wave in graphite by ultrashort-pulse laser irradiation
title_short Generation of a large compressive strain wave in graphite by ultrashort-pulse laser irradiation
title_sort generation of a large compressive strain wave in graphite by ultrashort-pulse laser irradiation
topic Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6422787/
https://www.ncbi.nlm.nih.gov/pubmed/30915389
http://dx.doi.org/10.1063/1.5089291
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