Full experimental determination of tunneling time with attosecond-scale streaking method

Miao Yu; Kun Liu; Min Li; Jiaqing Yan; Chuanpeng Cao; Jia Tan; Jintai Liang; Keyu Guo; Wei Cao; Pengfei Lan; Qingbin Zhang; Yueming Zhou; Peixiang Lu

doi:10.1038/s41377-022-00911-8

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Full experimental determination of tunneling time with attosecond-scale streaking method

Original Articles

- Full experimental determination of tunneling time with attosecond-scale streaking method
- Light: Science & Applications Vol. 11, Issue 8, Pages: 1903-1908(2022)
- Affiliations：
  
  1.Wuhan National Laboratory for Optoelectronics and School of Physics, Huazhong University of Science and Technology, 430074 Wuhan, Chinaa
  2.Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, 215009 Suzhou, China
  3.Optics Valley Laboratory, 430074 Hubei, China
- Author bio：
  
  Min Li (mli@hust.edu.cn)
  Yueming Zhou (zhouymhust@hust.edu.cn)
  Peixiang Lu (lupeixiang@hust.edu.cn)
- Funds：
- DOI：10.1038/s41377-022-00911-8
  CLC：
- Published：31 August 2022，
  
  Published Online：07 July 2022，
  
  Received：10 January 2022，
  
  Revised：13 June 2022，
  
  Accepted：23 June 2022
- Accepted：
Scan for full text
Yu, M. et al. Full experimental determination of tunneling time with attosecond-scale streaking method. Light: Science & Applications, 11, 1903-1908 (2022).
DOI：

Yu, M. et al. Full experimental determination of tunneling time with attosecond-scale streaking method. Light: Science & Applications, 11, 1903-1908 (2022). DOI： 10.1038/s41377-022-00911-8.

摘要

Abstract

Tunneling is one of the most fundamental and ubiquitous processes in the quantum world. The question of how long a particle takes to tunnel through a potential barrier has sparked a long-standing debate since the early days of quantum mechanics. Here

we propose and demonstrate a novel scheme to accurately determine the tunneling time of an electron. In this scheme

a weak laser field is used to streak the tunneling current produced by a strong elliptically polarized laser field in an attoclock configuration

allowing us to retrieve the tunneling ionization time relative to the field maximum with a precision of a few attoseconds. This overcomes the difficulties in previous attoclock measurements wherein the Coulomb effect on the photoelectron momentum distribution has to be removed with theoretical models and it requires accurate information of the driving laser fields. We demonstrate that the tunneling time of an electron from an atom is close to zero within our experimental accuracy. Our study represents a straightforward approach toward attosecond time-resolved imaging of electron motion in atoms and molecules.

关键词

Keywords

references

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