Abstract
We demonstrate theoretically that the temporal structure of high harmonic x-ray pulses generated with midinfrared lasers differs substantially from those generated with near-infrared pulses, especially at high photon energies. In particular, we show that, although the total width of the x-ray bursts spans femtosecond time scales, the pulse exhibits a zeptosecond structure due to the interference of high harmonic emission from multiple reencounters of the electron wave packet with the ion. Properly filtered and without any compensation of the chirp, regular subattosecond keV waveforms can be produced.
- Received 30 January 2013
DOI:https://doi.org/10.1103/PhysRevLett.111.033002
© 2013 American Physical Society
Synopsis
Quickening the Pulse
Published 18 July 2013
A theoretical study suggests that infrared laser pulses can create sequences of x-ray pulses as short as a few hundred zeptoseconds.
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