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  • Letter

Coherent control of atomic inner-shell x-ray lasing via perturbed valence-shell transitions

Jianpeng Liu1,2, Yongqiang Li1,2, Li Wang1, Jing Zhao1, Jianmin Yuan2,1,*, and Xiangjin Kong1,2,†

  • 1Department of Physics, National University of Defense Technology, 410073 Changsha, China
  • 2Department of Physics, Graduate School of China Academy of Engineering Physics, 100193 Beijing, China

  • *jmyuan@gscaep.ac.cn
  • †kongxiangjin@nudt.edu.cn
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Phys. Rev. A 104, L031101 – Published 8 September, 2021

DOI: https://doi.org/10.1103/PhysRevA.104.L031101

Abstract

Atomic inner-shell x-ray lasers pumped by an x-ray free-electron laser generate ultrashort, intense, monochromatic pulses with temporal coherence. Coherent control of lasing in monovalent magnesium ions is investigated theoretically, where valence-shell transitions are driven by optical lasers. Modulated high-order sidebands and attosecond pulses are generated with quasi-continuous-wave and few-cycle control lasers, respectively. The general manipulation scheme involves fast Auger decay, limited pump coherence, diverse coupling channels, and collisions in the plasma. Our approach shows potential applications in high-resolution spectroscopy, nonlinear x-ray studies, metrology, and ultrafast science in keV regime.

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Phys. Rev. A 104, L031101– Published 8 September, 2021
  • Received 19 October 2020
  • Revised 17 August 2021
  • Accepted 23 August 2021
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