Propagation-enhanced generation of intense high-harmonic continua in the 100-eV spectral region
The study of core electron dynamics through nonlinear spectroscopy requires intense isolated attosecond extreme ultraviolet or even X-ray pulses. A robust way to produce these pulses is high-harmonic generation (HHG) in a gas medium. However, the energy upscaling of the process depends on a very dem...
Elmentve itt :
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| Dokumentumtípus: | Cikk |
| Megjelent: |
2018
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| Sorozat: | OPTICA
5 No. 10 |
| doi: | 10.1364/OPTICA.5.001283 |
| mtmt: | 30317100 |
| Online Access: | http://publicatio.bibl.u-szeged.hu/14015 |
| Tartalmi kivonat: | The study of core electron dynamics through nonlinear spectroscopy requires intense isolated attosecond extreme ultraviolet or even X-ray pulses. A robust way to produce these pulses is high-harmonic generation (HHG) in a gas medium. However, the energy upscaling of the process depends on a very demanding next-generation laser technology that provides multi-terawatt (TW) laser pulses with few-optical-cycle duration and controlled electric field. Here, we revisit the HHG process driven by 16-TW sub-two-cycle laser pulses to reach high intensity in the 100-eV spectral region and beyond. We show that the combination of above barrier-suppression intensity with a long generation medium significantly enhances the isolation of attosecond pulses compared to lower intensities and/or shorter media and this way reduces the pulse duration as well as field-stability requirements on the laser driver. This novel regime facilitates the real-time observation of electron dynamics at the attosecond timescale in atoms, molecules, and solids. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement |
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| Terjedelem/Fizikai jellemzők: | 1283-1289 |
| ISSN: | 2334-2536 |