Ultrafast Excitation of an Inner-Shell Electron by Laser-Induced Electron Recollision

Yunpei Deng, Zhinan Zeng, Zhengmao Jia, Pavel Komm, Yinhui Zheng, Xiaochun Ge, Ruxin Li, and Gilad Marcus
Phys. Rev. Lett. 116, 073901 – Published 18 February 2016
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Abstract

Extreme ultraviolet attosecond pulses, generated by a process known as laser-induced electron recollision, are a key ingredient for attosecond metrology, providing a tool to precisely initiate and probe subfemtosecond dynamics in atoms, molecules, and solids. However, extending attosecond metrology to scrutinize the dynamics of the inner-shell electrons is a challenge, that is because of the lower efficiency in generating the required soft x-ray (ω>300eV) attosecond bursts. A way around this problem is to use the recolliding electron to directly initiate the desired inner-shell process, instead of using the currently low flux x-ray attosecond sources. Such an excitation process occurs in a subfemtosecond time scale, and may provide the necessary “pump” step in a pump-probe experiment. Here we used a few cycle infrared (λ01800nm) source and observed direct evidence for inner-shell excitations through the laser-induced electron recollision process. It is the first step toward time-resolved core-hole studies in the keV energy range with subfemtosecond time resolution.

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  • Received 13 October 2015

DOI:https://doi.org/10.1103/PhysRevLett.116.073901

© 2016 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Atomic, Molecular & Optical

Authors & Affiliations

Yunpei Deng1, Zhinan Zeng2,3, Zhengmao Jia2, Pavel Komm4, Yinhui Zheng2, Xiaochun Ge2, Ruxin Li2,3,5,*, and Gilad Marcus4,†

  • 1SwissFEL, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
  • 2State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 3IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China
  • 4Department of Applied Physics, Benin School of Engineering and Computer Science, Hebrew University of Jerusalem, Jerusalem 91904, Israel
  • 5School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China

  • *Corresponding author. ruxinli@mail.shcnc.ac.cn
  • Corresponding author. gilad.marcus@mail.huji.ac.il

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Issue

Vol. 116, Iss. 7 — 19 February 2016

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