Kerbstadt, Stefanie and Pengel, Dominik and Johannmeyer, Daniela and Englert, Lars and Bayer, Tim and Wollenhaupt, Matthias (2017) Control of photoelectron momentum distributions by bichromatic polarization-shaped laser fields. New journal of physics, 19 (10). p. 103017. ISSN 1367-2630

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Abstract

Bichromatic polarization-shaped femtosecond laser pulses are used to control three-dimensional photoelectron momentum distributions (3D-EDs) from resonance enhanced multi-photon ionization of potassium atoms. The light fields consisting of two spectral bands with different ellipticity are produced using an ultrafast polarization pulse shaper equipped with a custom polarizer in the Fourier plane. The tomographically reconstructed 3D-EDs from ionization with counterrotating circularly or orthogonal linearly polarized bichromatic laser pulses show different angular momentum superposition states at four distinct photoelectron energies. The analysis of the measured 3D-EDs reveals that the underlying physical mechanism is based on the interplay of ionization pathway selection via quantum mechanical selection rules for optical transitions and intrapulse frequency mixing of the spectral bands with different ellipticity.

Item Type:	Article
Additional Information:	Publiziert mit Hilfe des DFG-geförderten Open Access-Publikationsfonds der Carl von Ossietzky Universität Oldenburg.
Uncontrolled Keywords:	ultrafast polarization shaping, bichromatic laser fields, photoelectron imaging spectroscopy, tomographic reconstruction, free electron wave packets, resonance enhanced multi-photon ionization
Subjects:	Science and mathematics > Physics
Divisions:	Faculty of Mathematics and Science > Institute of Physics (IfP)
Date Deposited:	22 Nov 2017 13:03
Last Modified:	11 Jan 2018 09:29
URI:	https://oops.uni-oldenburg.de/id/eprint/3391
URN:	urn:nbn:de:gbv:715-oops-34722
DOI:	10.1088/1367-2630/aa83a4
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