Related Experiment Video
Updated: Mar 26, 2026
09:00
Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
10.6K
Invited Article: High resolution angle resolved photoemission with tabletop 11 eV laser
Yu He1, Inna M Vishik1, Ming Yi1
1SIMES, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
The Review of Scientific Instruments
|February 1, 2016
Summary
We created a table-top vacuum ultraviolet (VUV) laser for high-resolution angle-resolved photoemission spectroscopy (ARPES). This VUV laser achieves excellent energy and momentum resolution, advancing quantum materials research.
Area of Science:
- Physics
- Materials Science
- Spectroscopy
Background:
- High-resolution angle-resolved photoemission spectroscopy (ARPES) is crucial for understanding quantum materials.
- Existing ARPES setups face limitations in accessibility and resolution, often requiring large synchrotron facilities.
Purpose of the Study:
- To develop and demonstrate a compact, table-top vacuum ultraviolet (VUV) laser as a viable photon source for high-resolution ARPES.
- To achieve energy and momentum resolutions comparable to or exceeding current standards, enabling detailed electronic structure studies.
Main Methods:
- Development of a sub-nanosecond pulsed VUV laser with a wavelength of 113.778 nm (10.897 eV).
- Operation at a 10 MHz repetition rate with a photon flux of 2 × 10^12 photons/s.
- Characterization of photoemission performance, including energy and momentum resolution, and mitigation of space-charge effects.
Main Results:
- Achieved energy resolution better than 2 meV and momentum resolution better than 0.012 Å⁻¹.
- Reduced space-charge induced energy shifts and spectral broadenings below 2 meV.
- Demonstrated access to electron momenta up to 1.2 Å⁻¹, covering the first Brillouin zone of most materials.
Conclusions:
- The developed table-top VUV laser is a powerful and accessible photon source for high-resolution ARPES.
- This technology bridges the gap between low-energy laser ARPES and synchrotron-based ARPES, facilitating broader quantum materials research.
- The source's tunable parameters (polarization, repetition rate, flux) support diverse ARPES investigations on superconductors and other quantum materials.
