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Proceedings Paper

Cavity-enhanced high-harmonic generation for XUV time-resolved ARPES: quantitative determination electron-phonon coupling in the time domain (Conference Presentation)
Author(s): Andrea Damascelli; David J. Jones; Arthur K. Mills

Paper Abstract

With its direct correspondence to the electronic structure, angle-resolved photoemission spectroscopy (ARPES) is a ubiquitous tool for the study of solids. When extended to the temporal domain, time-resolved (TR)-ARPES offers the potential to move beyond equilibrium properties, exploring both the unoccupied electronic structure as well as its dynamical response under ultrafast perturbation. By performing high-harmonic generation inside a femtosecond enhancement cavity (fsEC), we realized a practical source for TR-ARPES that achieves a flux of over 10^11 photons/s delivered to the sample, and operates over a range of 8-40 eV with a repetition rate of 60 MHz. This source enables TR-ARPES studies with a temporal and energy resolution of 190 fs and 22 meV, respectively. To showcase the capabilities of this setup, we develop a novel approach to determine the mode-projected electron-phonon matrix element in graphite, with unprecedented sensitivity, directly in the time domain.

Paper Details

Date Published: 10 March 2020
Proc. SPIE 11278, Ultrafast Phenomena and Nanophotonics XXIV, 1127818 (10 March 2020); doi: 10.1117/12.2538401
Show Author Affiliations
Andrea Damascelli, The Univ. of British Columbia (Canada)
David J. Jones, The Univ. of British Columbia (Canada)
Arthur K. Mills, The Univ. of British Columbia (Canada)

Published in SPIE Proceedings Vol. 11278:
Ultrafast Phenomena and Nanophotonics XXIV
Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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