Speaker
Birger Böning
(Friedrich-Schiller-Universität Jena)
Description
Attosecond streaking is an established technique to measure timing
information in the interaction of ultrashort laser pulses with atoms
or molecules. This technique is based on the photoionization by an
attosecond laser pulse in the presence of a strong linearly polarized
near infrared (NIR) laser pulse. We investigate the attosecond streaking
with an X wave pulse carrying orbital angular momentum and a
strong linearly polarized near infrared (NIR) laser pulse. In contrast
to plane wave pulses, X waves have a spatially dependent temporal
profile, which modifies the ionization process. In this contribution we
theoretically explore the influence of this complex pulse structure on
the streaking of photoelectrons for both localized and macroscopically
extended targets. On the basis of the strong-field approximation
(SFA), we find that the streaking spectra of localized targets sensitively
depend on the opening angle of the X wave and the position
of the atomic target relative to the beam axis. For macroscopically
extended targets, we find that the streaking spectra do not depend on
the parameters characterizing the twist of the X wave.
Primary author
Birger Böning
(Friedrich-Schiller-Universität Jena)
