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Title: Ultrafast extreme ultraviolet photoemission without space charge

Journal Article · · Structural Dynamics
DOI:https://doi.org/10.1063/1.5045578· OSTI ID:1483745
 [1];  [1];  [1];  [1];  [2];  [1]; ORCiD logo [3];  [1]
  1. Stony Brook Univ., Stony Brook, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Stony Brook Univ., Stony Brook, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)

Time- and Angle-resolved photoelectron spectroscopy from surfaces can be used to record the dynamics of electrons and holes in condensed matter on ultrafast time scales. However, ultrafast photoemission experiments using extreme-ultraviolet (XUV) light have previously been limited by either space-charge effects, low photon flux, or limited tuning range. In this article, we describe XUV photoelectron spectroscopy experiments with up to 5 nA of average sample current using a tunable cavity-enhanced high-harmonic source operating at 88 MHz repetition rate. The source delivers >1011 photons/s in isolated harmonics to the sample over a broad photon energy range from 18 to 37 eV with a spot size of 58 × 100 μm2. From photoelectron spectroscopy data, we place conservative upper limits on the XUV pulse duration and photon energy bandwidth of 93 fs and 65 meV, respectively. In conclusion, the high photocurrent, lack of strong space charge distortions of the photoelectron spectra, and excellent isolation of individual harmonic orders allow us to observe laser-induced modifications of the photoelectron spectra at the 10–4 level, enabling time-resolved XUV photoemission experiments in a qualitatively new regime.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704; SC0016017
OSTI ID:
1483745
Alternate ID(s):
OSTI ID: 1468879
Report Number(s):
BNL-209507-2018-JAAM
Journal Information:
Structural Dynamics, Vol. 5, Issue 5; ISSN 2329-7778
Publisher:
American Crystallographic Association/AIPCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 51 works
Citation information provided by
Web of Science

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Cited By (26)

High-flux ultrafast extreme-ultraviolet photoemission spectroscopy at 18.4 MHz pulse repetition rate journal January 2019
Time-resolved XUV ARPES with tunable 24–33 eV laser pulses at 30 meV resolution journal August 2019
Temporal solitons in free-space femtosecond enhancement cavities journal January 2019
A setup for extreme-ultraviolet ultrafast angle-resolved photoelectron spectroscopy at 50-kHz repetition rate journal February 2019
Time- and angle-resolved photoemission spectroscopy of solids in the extreme ultraviolet at 500 kHz repetition rate journal February 2019
Ultrafast photoelectron spectroscopy of aqueous solutions journal September 2019
Time- and momentum-resolved photoemission studies using time-of-flight momentum microscopy at a free-electron laser journal January 2020
Extreme ultraviolet time- and angle-resolved photoemission setup with 21.5 meV resolution using high-order harmonic generation from a turn-key Yb:KGW amplifier journal January 2020
Gigahertz-repetition-rate, narrowband-deep-ultraviolet light source for minimization of acquisition time in high-resolution angle-resolved photoemission spectroscopy journal December 2019
Coherent narrowband light source for ultrafast photoelectron spectroscopy in the 17–31 eV photon energy range journal January 2020
Extreme ultraviolet time-resolved photoelectron spectroscopy of aqueous aniline solution: enhanced surface concentration and pump-induced space charge effect journal April 2020
Efficiency of cavity-enhanced high harmonic generation with geometric output coupling journal March 2019
Cavity-enhanced noncollinear high-harmonic generation journal January 2019
Spin-ARPES EUV Beamline for Ultrafast Materials Research and Development journal January 2019
A High Resolution XUV Grating Monochromator for the Spectral Selection of Ultrashort Harmonic Pulses journal June 2019
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Time- and momentum-resolved photoemission studies using time-of-flight momentum microscopy at a free-electron laser text January 2020
Extreme ultraviolet time-resolved photoelectron spectroscopy of aqueous aniline solution: enhanced surface concentration and pump-induced space charge effect text January 2020
Cavity-Enhanced Noncollinear High-Harmonic Generation conference June 2019
Time- and momentum-resolved photoemission studies using time-of-flight momentum microscopy at a free-electron laser text January 2020
Extreme ultraviolet time-resolved photoelectron spectroscopy of aqueous aniline solution: enhanced surface concentration and pump-induced space charge effect text January 2020
Time- and angle-resolved photoemission spectroscopy of solids in the extreme ultraviolet at 500 kHz repetition rate text January 2018
Extreme Ultraviolet Time- and Angle-Resolved Photoemission Spectroscopy with 21.5 meV Resolution using High-Order Harmonic Generation from a Turn-Key Yb:KGW Amplifier text January 2019
An open-source, end-to-end workflow for multidimensional photoemission spectroscopy text January 2019
Time-Resolved Momentum Microscopy with a 1 MHz High-Harmonic Extreme Ultraviolet Beamline text January 2020
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