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Determination of transient atomic structure of laser-excited materials from time-resolved diffraction data

Giret, Y; Naruse, N; Daraszewicz, SL; Murooka, Y; Yang, J; Duffy, DM; Shluger, AL; (2013) Determination of transient atomic structure of laser-excited materials from time-resolved diffraction data. Applied Physics Letters , 103 (25) , Article 253107. 10.1063/1.4847695. Green open access

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Abstract

The time evolution of the Bragg peaks of photo-excited gold nanofilms is measured using transmission ultrafast electron diffraction (UED) with 3.0 MeV electron pulses and the corresponding structure evolution is calculated using two-temperature molecular dynamics (2T-MD). The good agreement obtained between the measured and calculated Bragg peaks, over the full experimental timescale, enables the lattice temperature effects and the structural changes to be disentangled for the first time. The agreement demonstrates that 2T-MD is a reliable method for solving the inverse problem of structure determination of laser irradiated metals in UED measurements.

Type: Article
Title: Determination of transient atomic structure of laser-excited materials from time-resolved diffraction data
Open access status: An open access version is available from UCL Discovery
DOI: 10.1063/1.4847695
Publisher version: http://dx.doi.org/10.1063/1.4847695
Language: English
Additional information: © 2013 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters , 103 (25) 253107 and may be found at http://dx.doi.org/ 10.1063/1.4847695.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/1418703
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