Physics – Condensed Matter – Superconductivity
Scientific paper
2007-11-02
REVIEW OF SCIENTIFIC INSTRUMENTS 79, 023105 (2008)
Physics
Condensed Matter
Superconductivity
29 pages, 10 figures, submitted to Review of Scientific Instruments
Scientific paper
10.1063/1.2835901
The design and performance of the first vacuum ultra-violet (VUV) laser-based angle-resolved photoemission (ARPES) system are described. The VUV laser with a photon energy of 6.994 eV and bandwidth of 0.26 meV is achieved from the second harmonic generation using a novel non-linear optical crystal KBe2BO3F2 (KBBF). The new VUV laser-based ARPES system exhibits superior performance, including super-high energy resolution better than 1 meV, high momentum resolution, super-high 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.
Chen Chuangtian
Dong Xiaoli
Liu Guodong
Liu Haiyun
Meng Jianqiao
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