Attosecond streaking using a rescattered electron in an intense laser field

Area of Science:

• Atomic, Molecular, and Optical Physics
• Quantum Dynamics
• Ultrafast Science

Background:

• Ultrafast electron motion in strong laser fields is sensitive to laser field variations.
• Attosecond streaking is a technique for characterizing ultrashort laser pulses.
• Previous methods like high harmonic generation have limitations in spatial ambiguity.

Purpose of the Study:

• To demonstrate a novel attosecond streaking technique using rescattered electrons.
• To achieve complete in situ temporal characterization of laser fields.
• To provide timing information for ionization and rescattering events in strong-field physics.

Main Methods:

• Utilizing rescattered electron trajectories manipulated by an ultrashort laser pulse.
• Analyzing photoelectron spectra to record the laser pulse's vector potential.
• Employing a new attosecond streaking approach without spatial directional ambiguity.

Main Results:

• Direct recording of the laser pulse's vector potential in photoelectron spectra.
• Achieved complete in situ temporal characterization of the laser field.
• Obtained timing information on ionization and rescattering events.

Conclusions:

• The demonstrated attosecond streaking method offers a robust tool for laser field characterization.
• This technique overcomes spatial ambiguity issues present in other methods.
• It is valuable for investigating strong-field processes like non-sequential double ionization and laser-induced electron diffraction.