Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 62: Poster: Quantum Optics and Photonics III

Q 62.101: Poster

Thursday, March 26, 2015, 17:00–19:00, C/Foyer

Intensity dependence of photoelectronic angular distributions — •Eike Lübking, Torsten Hartmann, Christoph Vorndamme, Uwe Morgner, and Milutin Kovacev — Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, D-30167 Hannover, Germany

The intensity dependence of the angular and energy distributions of photoelectrons has been used to study the diverse processes involved in the 800-nm short-pulse ionization of xenon and argon, respectively, e.g. channel switching and resonant and non-resonant ionization [1, 2]. By looking at Rydberg resonances a relation between laser intensity in the focus and pulse energy could also be retrieved (intensity calibration).

In a first step we compare these results from literature, which were obtained with older photoelectron imaging spectrometers, to data obtained with a velocity map imaging spectrometer (VMI) utilized in our group. By using the high-power ultra-short laser sources available in our lab we are, in a second step, able to extend the study of intensity-related effects to a broader energy range. Additionally the ionization effects in other gases can be investigated.

[1] Schyja et al., PRA 57, 5, 3692 (1998) [2] Wiehle et al., PRA, 67, 063405 (2003)