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High resolution time- and angle-resolved photoemission spectroscopy with 11 eV laser pulses
- Source :
- Rev.Sci.Instrum.91.043102 (2020)
- Publication Year :
- 2019
-
Abstract
- Performing time and angle resolved photoemission spectroscopy (tr-ARPES) 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 (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 $5\times10^{10}$ 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 ErTe$_3$. This novel setup offers opportunity to study the non-equilibrium band structure of solids with exceptional energy and time resolutions at high repetition rates.
- Subjects :
- Condensed Matter - Materials Science
Condensed Matter - Other Condensed Matter
Subjects
Details
- Database :
- arXiv
- Journal :
- Rev.Sci.Instrum.91.043102 (2020)
- Publication Type :
- Report
- Accession number :
- edsarx.1910.14068
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1063/1.5139556