A vacuum ultraviolet laser with a submicrometer spot for spatially resolved photoemission spectroscopy

Mao Yuanhao; Zhao Dong; Yan Shen; Zhang Hongjia; Li Juan; Han Kai; Xu Xiaojun; Guo Chuan; Yang Lexian; Zhang Chaofan; Huang Kun; Chen Yulin

doi:10.1038/s41377-021-00463-3

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A vacuum ultraviolet laser with a submicrometer spot for spatially resolved photoemission spectroscopy

Articles

- A vacuum ultraviolet laser with a submicrometer spot for spatially resolved photoemission spectroscopy
- Light: Science & Applications Vol. 10, Issue 3, Pages: 371-378(2021)
- Affiliations：
  
  1.College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, Hunan 410073, China
  2.Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
  3.College of Intelligence Science and Technology, National University of Defense Technology, Changsha, Hunan 410073, China
  4.State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
  5.Department of Physics, Clarendon Laboratory, University of Oxford, Oxford, UK
  6.School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
- Author bio：
  
  Chaofan Zhang (c.zhang@nudt.edu.cn)
  Kun Huang (huangk17@ustc.edu.cn)
  Yulin Chen (yulin.chen@physics.ox.ac.uk)
- Funds：
- DOI：10.1038/s41377-021-00463-3
  CLC：
- Published：31 March 2021，
  
  Published Online：21 January 2021，
  
  Received：10 August 2020，
  
  Revised：25 December 2020，
  
  Accepted：31 December 2020
- Accepted：
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Mao, Y. H. et al. A vacuum ultraviolet laser with a submicrometer spot for spatially resolved photoemission spectroscopy. Light: Science & Applications 10, 371-378 (2021).
DOI：

Mao, Y. H. et al. A vacuum ultraviolet laser with a submicrometer spot for spatially resolved photoemission spectroscopy. Light: Science & Applications 10, 371-378 (2021). DOI： 10.1038/s41377-021-00463-3.

摘要

Abstract

Vacuum ultraviolet (VUV) lasers have demonstrated great potential as the light source for various spectroscopies

which

if they can be focused into a small beam spot

will not only allow investigation of mesoscopic materials a

nd structures but also find application in the manufacture of nano-objects with excellent precision. In this work

we report the construction of a 177 nm VUV laser that can achieve a record-small (~0.76 μm) focal spot at a long focal length (~45 mm) by using a flat lens without spherical aberration. The size of the beam spot of this VUV laser was tested using a metal grating and exfoliated graphene flakes

and we demonstrated its application in a fluorescence spectroscopy study on pure and Tm

-doped NaYF

microcrystals

revealing a new emission band that cannot be observed in the traditional up-conversion process. In addition

this laser system would be an ideal light source for spatially and angle-resolved photoemission spectroscopy.

关键词

Keywords

references

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