Development of a vacuum ultraviolet laser-based angle-resolved photoemission system with a superhigh energy resolution better than 1 meV
Abstract
The design and performance of the first vacuum ultraviolet (VUV) laser-based angle-resolved photoemission (ARPES) system are described. The VUV laser with a photon energy of 6.994eV and bandwidth of 0.26meV is achieved from the second harmonic generation using a novel nonlinear optical crystal KBe2BO3F2. The new VUV laser-based ARPES system exhibits superior performance, including superhigh energy resolution better than 1meV, high momentum resolution, superhigh photon flux, and much enhanced bulk sensitivity, which are demonstrated from measurements on a typical Bi2Sr2CaCu2O8 high temperature superconductor. Issues and further development related to the VUV laser-based photoemission technique are discussed.
- Publication:
-
Review of Scientific Instruments
- Pub Date:
- February 2008
- DOI:
- arXiv:
- arXiv:0711.0282
- Bibcode:
- 2008RScI...79b3105L
- Keywords:
-
- 07.81.+a;
- 42.62.Eh;
- 74.72.Hs;
- 79.60.Bm;
- Electron and ion spectrometers;
- Metrological applications;
- optical frequency synthesizers for precision spectroscopy;
- Bi-based cuprates;
- Clean metal semiconductor and insulator surfaces;
- Condensed Matter - Superconductivity;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 29 pages, 10 figures, submitted to Review of Scientific Instruments