High resolution time- and angle-resolved photoemission spectroscopy with 11 eV laser pulses
- Authors
- Lee, Changmin; Rohwer, Timm; Sie, Edbert J.; Zong, Alfred; Baldini, Edoardo; Straquadine, Joshua; Walmsley, Philip; Gardner, Dillon; Lee, Young S.; Fisher, Ian R.; Gedik Nuh
- Issue Date
- Apr-2020
- Publisher
- AMER INST PHYSICS
- Citation
- REVIEW OF SCIENTIFIC INSTRUMENTS, v.91, no.4
- Indexed
- SCIE
SCOPUS
- Journal Title
- REVIEW OF SCIENTIFIC INSTRUMENTS
- Volume
- 91
- Number
- 4
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/190457
- DOI
- 10.1063/1.5139556
- ISSN
- 0034-6748
- Abstract
- 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 recent advances, HHG-based setups still require large pulse energies (from hundreds of mu J 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 x 10(10) 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 mu J. 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 offers the opportunity to study the non-equilibrium band structure of solids with exceptional energy and time resolutions at high repetition rates.
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