High resolution time- and angle-resolved photoemission spectroscopy with 11 eV laser pulses
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 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 offers the opportunity to study the non-equilibrium band structure of solids with exceptional energy and time resolutions at high repetition rates.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 01, 2020
- Source ID
- 10.1063/1.5139556
Entities
People
- Alfred Zong
- Changmin Lee
- Dillon Gardner
- Edbert J Sie
- Edoardo Baldini
- Ian Fisher
- Joshua A W Straquadine
- Nuh Gedik
- Philip Walmsley
- Timm Rohwer
- Young S Lee
Organizations
- Army Research Office
- Gordon and Betty Moore Foundation
- Massachusetts Institute of Technology
- Stanford University
- United States Department of Energy