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Atomic inner-shell X-ray laser at 1.46 nanometres pumped by an X-ray free-electron laser
| Content Provider | Semantic Scholar |
|---|---|
| Author | Rohringer, Nina Ryan, Duncan London, Richard Purvis, Michael A. Albert, Félicie Dunn, James C. Y. Bozek, John D. Bostedt, Christoph Graf, Alexander Turner Hill, Randal W. Hau-Riege, Stefan Rocca, Jorge Juan Gabriel |
| Copyright Year | 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. |
| Starting Page | 488 |
| Ending Page | 491 |
| Page Count | 4 |
| File Format | PDF HTM / HTML |
| DOI | 10.1038/nature10721 |
| Alternate Webpage(s) | http://www.engr.colostate.edu/ece/faculty/rocca/pdf/journals/rohringer_etal_2012.pdf |
| PubMed reference number | 22281598 |
| Alternate Webpage(s) | https://doi.org/10.1038/nature10721 |
| Journal | Medline |
| Volume Number | 481 |
| Journal | Nature |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
