Cited by 176Laser-Matter Interactions and ApplicationsParticle Accelerators and Free-Electron LasersAtomic and Molecular Physics

Atomic inner-shell laser at 1.5-ångström wavelength pumped by an X-ray free-electron laser

Yoneda, Hitoki, Inubushi, Yuichi, Nagamine, Kazunori, Michine, Yurina, Ohashi, Haruhiko, Yumoto, Hirokatsu, Yamauchi, Kazuto, Mimura, Hidekazu +4 more·2015·Nature

Abstract

Since the invention of the first lasers in the visible-light region, research has aimed to produce short-wavelength lasers that generate coherent X-rays; the shorter the wavelength, the better the imaging resolution of the laser and the shorter the pulse duration, leading to better temporal resolution in probe measurements. Recently, free-electron lasers based on self-amplified spontaneous emission have made it possible to generate a hard-X-ray laser (that is, the photon energy is of the order of ten kiloelectronvolts) in an ångström-wavelength regime, enabling advances in fields from ultrafast X-ray spectrosopy to X-ray quantum optics. An atomic laser based on neon atoms and pumped by a soft-X-ray (that is, a photon energy of less than one kiloelectronvolt) free-electron laser has been achieved at a wavelength of 14 nanometres. Here, we use a copper target and report a hard-X-ray inner-shell atomic laser operating at a wavelength of 1.5 ångströms. X-ray free-electron laser pulses with an intensity of about 10(19) watts per square centimetre tuned to the copper K-absorption edge produced sufficient population inversion to generate strong amplified spontaneous emission on the copper Kα lines. Furthermore, we operated the X-ray free-electron laser source in a two-colour mode, with one colour tuned for pumping and the other for the seed (starting) light for the laser.

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Crossref · 10.1038/nature14894

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  • Schemes have been developed to create multipulse and polychromatic radiation, and FEL light has been used to pump atomic lasers in the x-ray region.

    “Schemes have been developed to create multipulse and polychromatic radiation, and FEL light has been used to pump atomic lasers in the x-ray region [58,68].”

    From Roadmap of ultrafast x-ray atomic and molecular physics (2018) · cites this paper as [68]

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Authors
Yoneda, H., Inubushi, Y., Nagamine, K., Michine, Y., Ohashi, H., Yumoto, H., Yamauchi, K., Mimura, H., Kitamura, H., Katayama, T., Ishikawa, T., & Yabashi, M.
Affiliations
  • University of Electro-Communications (JP)
  • SPring-8 (JP)
  • Japan Synchrotron Radiation Research Institute (JP)
  • Kyoto University (JP)
Corresponding author
Yoneda, Hitoki
Venue
Nature
Published
2015-08
Volume
524
Issue
7566
Pages
446-449
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W1915555037
Cited by
175
References
28
Citations by year
2026: 9 · 2025: 17 · 2024: 18 · 2023: 13 · 2022: 7 · 2021: 17 · 2020: 21 · 2019: 15 · 2018: 17 · 2017: 22 · 2016: 16 · 2015: 3
FWCI
9.83
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
Japan Society for the Promotion of Science (25247093, 23226004)
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Particle Accelerators and Free-Electron Lasers
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Atomic and Molecular Physics
Keywords
atomic lasers, amplified spontaneous emission, X-ray free-electron laser, copper target, inner-shell excitation, population inversion, ultrafast X-ray spectroscopy, x-ray quantum optics

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