Rostock 2019 – scientific programme

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A: Fachverband Atomphysik

A 4: Atomic systems in external fields

A 4.2: Talk

Monday, March 11, 2019, 11:00–11:15, S HS 3 Physik

Imaging multiple Rydberg wave packets from shaper-generated two-color femtosecond pump-probe sequences — •Kevin Eickhoff, Stefanie Kerbstadt, Lukas Gabrisch, Tim Bayer, and Matthias Wollenhaupt — Carl von Ossietzky Universität, Oldenburg

Background-free detection of Rydberg dynamics is performed using shaper-generated bichromatic linearly and circularly polarized femtosecond pump-probe pulse sequences. We combine a bichromatic white light polarization pulse shaping scheme with angle- and energy-resolved photoelectron imaging to map the resulting Rydberg wave packet dynamics. Photoelectron momentum distributions from linearly polarized bichromatic fields feature pronounced time-, energy- and angle-dependent dynamics, which result from the coherent superposition of s-, d- and g-type photoelectron wave packets from ionization of the Rydberg np- and nf-series. Detailed analysis of the highly differential data allows us to extract the dynamics of the involved Rydberg wave packets separately. The results are verified by measurements with circularly polarized pump-probe pulse sequences which exclusively address the Rydberg nf-series and probe its dynamics into the g-type continuum. Further studies with CEP-stabilized bichromatic femtosecond pulse sequences and holographic measurements of the Rydberg wave packet's quantum phases are presented.