17 May 2017 Generation of attosecond electron pulses using petawatt lasers
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Abstract
Ionization of positive ions by relativistically-intense short laser pulses is analyzed in the framework of relativistic strong-field theory. We observe the appearance of broad interference-free patterns in the high-energy portion of the photoelectron spectra, which extend over hundreds of driving photon energies. These structures can be controlled by changing parameters of the driving laser field. As we also demonstrate, the electrons comprising these broad structures can form pulses of attosecond duration. While we present the fully numerical results for laser field intensities below 1020W=cm2, we also introduce the saddle point approximation to treat photoionization at larger intensities. In addition, the conditions enabling generation of ultrashort electron pulses are studied.
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Katarzyna Krajewska, Felipe Cajiao Vélez, Jerzy Z. Kamiński, "Generation of attosecond electron pulses using petawatt lasers", Proc. SPIE 10241, Research Using Extreme Light: Entering New Frontiers with Petawatt-Class Lasers III, 102411J (17 May 2017); doi: 10.1117/12.2271138; https://doi.org/10.1117/12.2271138
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