Propagation-enhanced generation of intense high-harmonic continua in the 100-eV spectral region
Posted on 2018-10-11 - 14:10
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-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 time-scale in atoms, molecules and solids.
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Rivas, Daniel; Major, Balazs; Weidman, Matthew; Helml, Wolfram; Marcus, Gilad; Kienberger, Reinhard; et al. (2018). Propagation-enhanced generation of intense high-harmonic continua in the 100-eV spectral region. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.4234466.v1
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AUTHORS (10)
DR
Daniel Rivas
BM
Balazs Major
MW
Matthew Weidman
WH
Wolfram Helml
GM
Gilad Marcus
RK
Reinhard Kienberger
DC
Dimitris Charalambidis
PT
Paraskevas Tzallas
EB
Emeric Balogh
KK
Katalin Kovács