Atomic inner-shell X-ray laser at 1.46 nanometres pumped by an X-ray free-electron laser - PubMed (original) (raw)

. 2012 Jan 25;481(7382):488-91.

doi: 10.1038/nature10721.

Duncan Ryan, Richard A London, Michael Purvis, Felicie Albert, James Dunn, John D Bozek, Christoph Bostedt, Alexander Graf, Randal Hill, Stefan P Hau-Riege, Jorge J Rocca

Affiliations

• PMID: 22281598
• DOI: 10.1038/nature10721

Atomic inner-shell X-ray laser at 1.46 nanometres pumped by an X-ray free-electron laser

Nina Rohringer et al. Nature. 2012.

Abstract

Since the invention of the laser more than 50 years ago, scientists have striven to achieve amplification on atomic transitions of increasingly shorter wavelength. The introduction of X-ray free-electron lasers makes it possible to pump new atomic X-ray lasers with ultrashort pulse duration, extreme spectral brightness and full temporal coherence. Here we describe the implementation of an X-ray laser in the kiloelectronvolt energy regime, based on atomic population inversion and driven by rapid K-shell photo-ionization using pulses from an X-ray free-electron laser. We established a population inversion of the Kα transition in singly ionized neon at 1.46 nanometres (corresponding to a photon energy of 849 electronvolts) in an elongated plasma column created by irradiation of a gas medium. We observed strong amplified spontaneous emission from the end of the excited plasma. This resulted in femtosecond-duration, high-intensity X-ray pulses of much shorter wavelength and greater brilliance than achieved with previous atomic X-ray lasers. Moreover, this scheme provides greatly increased wavelength stability, monochromaticity and improved temporal coherence by comparison with present-day X-ray free-electron lasers. The atomic X-ray lasers realized here may be useful for high-resolution spectroscopy and nonlinear X-ray studies.

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Comment in

• Laser science: Even harder X-rays.
  Marangos J. Marangos J. Nature. 2012 Jan 25;481(7382):452-3. doi: 10.1038/481452a. Nature. 2012. PMID: 22281590 No abstract available.

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