Rapid high-resolution spin- and angle-resolved photoemission spectroscopy with pulsed laser source and time-of-flight spectrometer
- Graduate Group in Applied Science and Technology, University of California, Berkeley, California 94720 (United States)
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
- Department of Physics, University of California, Berkeley, California 94720, USA and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
A high-efficiency spin- and angle-resolved photoemission spectroscopy (spin-ARPES) spectrometer is coupled with a laboratory-based laser for rapid high-resolution measurements. The spectrometer combines time-of-flight (TOF) energy measurements with low-energy exchange scattering spin polarimetry for high detection efficiencies. Samples are irradiated with fourth harmonic photons generated from a cavity-dumped Ti:sapphire laser that provides high photon flux in a narrow bandwidth, with a pulse timing structure ideally matched to the needs of the TOF spectrometer. The overall efficiency of the combined system results in near-E{sub F} spin-resolved ARPES measurements with an unprecedented combination of energy resolution and acquisition speed. This allows high-resolution spin measurements with a large number of data points spanning multiple dimensions of interest (energy, momentum, photon polarization, etc.) and thus enables experiments not otherwise possible. The system is demonstrated with spin-resolved energy and momentum mapping of the L-gap Au(111) surface states, a prototypical Rashba system. The successful integration of the spectrometer with the pulsed laser system demonstrates its potential for simultaneous spin- and time-resolved ARPES with pump-probe based measurements.
- OSTI ID:
- 22220352
- Journal Information:
- Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 9 Vol. 84; ISSN 0034-6748; ISSN RSINAK
- Country of Publication:
- United States
- Language:
- English
Similar Records
High-resolution detection system for time-of-flight electron spectrometry
Experimental setup for low-energy laser-based angle resolved photoemission spectroscopy
Related Subjects
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DETECTION
EFFICIENCY
ENERGY RESOLUTION
ENERGY TRANSFER
GOLD
IRRADIATION
LASERS
OPTICAL PUMPING
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
PHOTONS
POLARIMETRY
SAPPHIRE
TIME RESOLUTION
TIME-OF-FLIGHT METHOD
TIME-OF-FLIGHT SPECTROMETERS