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Proceedings Paper

Ultrafast extreme-ultraviolet ARPES studies of electronic dynamics in two-dimensional materials
Author(s): Jan Heye Buss; Julian Maklar; Frédéric Joucken; He Wang; Yiming Xu; Sung-Kwan Mo; Alessandra Lanzara; Robert A. Kaindl
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Paper Abstract

The intriguing electronic properties of two-dimensional materials motivates experiments to resolve their rapid, microscopic interactions and dynamics across momentum space. Essential insight into the electronic momentum-space dynamics can be obtained directly via time- and angle-resolved photoemission spectroscopy (trARPES). We discuss the development of a high-repetition rate trARPES setup that employs a bright source of narrowband, extreme-UV harmonics around 22.3 eV, and its application to sensitive studies of materials dynamics. In the bulk transition-metal dichalcogenide MoSe2 momentum-space quasiparticle scattering is observed after resonant excitation at the K-point exciton line, resulting in the time-delayed buildup of electrons at the Σ-point conduction band minimum. We will discuss this and other aspects of the non-equilibrium electronic response accessible with the extreme-UV trARPES probe.

Paper Details

Date Published: 23 February 2017
PDF: 6 pages
Proc. SPIE 10102, Ultrafast Phenomena and Nanophotonics XXI, 101020I (23 February 2017); doi: 10.1117/12.2251249
Show Author Affiliations
Jan Heye Buss, Lawrence Berkeley National Lab. (United States)
Julian Maklar, Lawrence Berkeley National Lab. (United States)
Frédéric Joucken, Lawrence Berkeley National Lab. (United States)
He Wang, Lawrence Berkeley National Lab. (United States)
Yiming Xu, Lawrence Berkeley National Lab. (United States)
Sung-Kwan Mo, Lawrence Berkeley National Lab. (United States)
Alessandra Lanzara, Lawrence Berkeley National Lab. (United States)
Univ. of California at Berkeley (United States)
Robert A. Kaindl, Lawrence Berkeley National Lab. (United States)

Published in SPIE Proceedings Vol. 10102:
Ultrafast Phenomena and Nanophotonics XXI
Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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