Capturing structural dynamics in crystalline silicon using chirped electrons from a laser wakefield accelerator

He, Z. -H. and Nees, John A. and Krushelnick, Karl and Thomas, Alexander George Roy and Faure, J. (2016) Capturing structural dynamics in crystalline silicon using chirped electrons from a laser wakefield accelerator. Scientific Reports, 6. ISSN 2045-2322

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Abstract

Recent progress in laser wakefield acceleration has led to the emergence of a new generation of electron and X-ray sources that may have enormous benefits for ultrafast science. These novel sources promise to become indispensable tools for the investigation of structural dynamics on the femtosecond time scale, with spatial resolution on the atomic scale. Here, we demonstrate the use of laser-wakefield-accelerated electron bunches for time-resolved electron diffraction measurements of the structural dynamics of single-crystal silicon nano-membranes pumped by an ultrafast laser pulse. In our proof-of-concept study, we resolve the silicon lattice dynamics on a picosecond time scale by deflecting the momentum-time correlated electrons in the diffraction peaks with a static magnetic field to obtain the time-dependent diffraction efficiency. Further improvements may lead to femtosecond temporal resolution, with negligible pump-probe jitter being possible with future laser-wakefield-accelerator ultrafast-electron-diffraction schemes.

Item Type: Journal Article
Journal or Publication Title: Scientific Reports
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/1000
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 83303
Deposited By: ep_importer_pure
Deposited On: 30 Nov 2016 14:14
Refereed?: Yes
Published?: Published
Last Modified: 23 Oct 2019 05:54
URI: https://eprints.lancs.ac.uk/id/eprint/83303

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