Development of a vacuum ultraviolet laser-based angle-resolved photoemission system with a superhigh energy resolution better than 1 meV

Guodong Liu; Guiling Wang; Yong Zhu; Hongbo Zhang; Guochun Zhang; Xiaoyang Wang; Yong Zhou; Wentao Zhang; Haiyun Liu; Lin Zhao; Jianqiao Meng; Xiaoli Dong; Chuangtian Chen; Zuyan Xu; X J Zhou

doi:10.1063/1.2835901

Development of a vacuum ultraviolet laser-based angle-resolved photoemission system with a superhigh energy resolution better than 1 meV

Rev Sci Instrum. 2008 Feb;79(2 Pt 1):023105. doi: 10.1063/1.2835901.

Authors

Guodong Liu¹, Guiling Wang, Yong Zhu, Hongbo Zhang, Guochun Zhang, Xiaoyang Wang, Yong Zhou, Wentao Zhang, Haiyun Liu, Lin Zhao, Jianqiao Meng, Xiaoli Dong, Chuangtian Chen, Zuyan Xu, X J Zhou

Affiliation

¹ National Laboratory for Superconductivity, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China.

PMID: 18315281
DOI: 10.1063/1.2835901

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 6.994 eV and bandwidth of 0.26 meV 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 1 meV, 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.