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Atomic inner-shell laser at 1.5-ångström wavelength pumped by an X-ray free-electron laser
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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“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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Metadata
- 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
- ORCID
- 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
- Licence
- www.springer.com/tdm (tdm)
- 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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