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10 March 2020 Cavity-enhanced high-harmonic generation for XUV time-resolved ARPES: quantitative determination electron-phonon coupling in the time domain (Conference Presentation)
Andrea Damascelli, David J. Jones, Arthur K. Mills
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Proceedings Volume 11278, Ultrafast Phenomena and Nanophotonics XXIV; 1127818 (2020) https://doi.org/10.1117/12.2538401
Event: SPIE OPTO, 2020, San Francisco, California, United States
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.
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Andrea Damascelli, David J. Jones, and Arthur K. Mills "Cavity-enhanced high-harmonic generation for XUV time-resolved ARPES: quantitative determination electron-phonon coupling in the time domain (Conference Presentation)", Proc. SPIE 11278, Ultrafast Phenomena and Nanophotonics XXIV, 1127818 (10 March 2020); https://doi.org/10.1117/12.2538401
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KEYWORDS
Extreme ultraviolet
Sodium
Ultrafast phenomena
Femtosecond phenomena
High harmonic generation
Phonons
Photoemission spectroscopy
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