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High resolution time- and angle-resolved photoemission spectroscopy with 11 eV laser pulses

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/1.5139556· OSTI ID:1616758
 [1];  [2];  [3];  [4];  [4];  [5];  [5];  [4];  [6];  [5];  [4]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Center for Free-Electron Laser Science
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  5. Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)
  6. Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Performing time- and angle-resolved photoemission (tr-ARPES) spectroscopy at high momenta necessitates extreme ultraviolet laser pulses, which are typically produced via high harmonic generation (HHG). Despite current advances, HHG-based setups still require large pulse energies (from hundreds of μJ to mJ) and their energy resolution is limited to tens of meV. Here, we present a novel 11 eV tr-ARPES setup that generates a flux of 5 × 1010 photons/s and achieves an unprecedented energy resolution of 16 meV. It can be operated at high repetition rates (up to 250 kHz) while using input pulse energies down to 3 µJ. We demonstrate these unique capabilities by simultaneously capturing the energy and momentum resolved dynamics in two well-separated momentum space regions of a charge density wave material ErTe3. This novel setup provides the opportunity to study the non-equilibrium band structure of solids with exceptional energy and time resolutions at high repetition rates.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Gordon and Betty Moore Foundation; Army Research Office (ARO); Swiss National Science Foundation
Grant/Contract Number:
FG02-08ER46521; AC02-76SF00515
OSTI ID:
1616758
Alternate ID(s):
OSTI ID: 1616480
Journal Information:
Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 4 Vol. 91; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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