Abstract
We combine bichromatic polarization pulse shaping with photoelectron imaging tomography for time-resolved spatial imaging of ultrafast spin–orbit wave packet (SOWP) dynamics in atoms. Polarization-shaped two-color pump-probe sequences are generated by spectral amplitude and phase modulation of a femtosecond input pulse and used to excite SOWPs in the potassium fine-structure doublet. By selecting different spectral bands for pump and probe pulse, we achieve interference-free detection of the spatiotemporal SOWP dynamics. Using tomographic techniques, we reconstruct the three-dimensional photoelectron momentum distribution (3D-ED) created by the probe pulse. Time-resolved measurement of the 3D-ED reveals the orbital realignment dynamics induced by spin–orbit interaction in the neutral atom.
Highlights
Nowadays, pump-probe techniques are established experimental tools to observe the motion of electrons and nuclei on their intrinsic ultrafast timescales
We present the results of two experiments carried out to study the spin–orbit wave packets (SOWPs) dynamics induced and probed by shaper-generated bichromatic circularly polarized (CRCP) and orthogonal linearly polarized (OLP) pulse sequences
While the scope of this recent publication was the sculpturing of static photoelectron momentum distributions by creation of unusual angular momentum superposition states, the focus of the present study is the observation of ultrafast dynamics by variation of the time delay
Summary
We combine bichromatic polarization pulse shaping with photoelectron imaging tomography for. Any further distribution of time-resolved spatial imaging of ultrafast spin–orbit wave packet (SOWP) dynamics in atoms. This work must maintain attribution to the Polarization-shaped two-color pump-probe sequences are generated by spectral amplitude and phase author(s) and the title of the work, journal citation modulation of a femtosecond input pulse and used to excite SOWPs in the potassium 4p fineand DOI. By selecting different spectral bands for pump and probe pulse, we achieve interference-free detection of the spatiotemporal SOWP dynamics. We reconstruct the three-dimensional photoelectron momentum distribution (3D-ED) created by the probe pulse. Time-resolved measurement of the 3D-ED reveals the orbital realignment dynamics induced by spin–orbit interaction in the neutral atom
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