Hannover 2016 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 24: Interaction with strong or short laser pulses I

A 24.8: Vortrag

Mittwoch, 2. März 2016, 12:45–13:00, f303

Double-slit electron interference in strong-field ionization of neon dimer — •Maksim Kunitski, Pia Huber, Jonas Köhler, Kevin Henrichs, Nikolai Schlott, and Reinhard Dörner — Institut für Kernphysik, Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße 1, D-60438 Frankfurt am Main

The double-slit experiment has been widely utilized in order to learn different aspects of quantum mechanics, as, for instance, in famous Bohr-Einstein debates. In 1960s it was realized that the double-slit experiment can be performed at the molecular level by exploiting two sites of a diatomic molecule as coherent electron emitters [1].

Here we report the observation of photo-electron double-slit interference in single ionization of neon dimer by a strong ultra-short laser field (40 fs, 790 nm, 6.0·10¹⁴ W/cm²). An electron and a single Ne ion resulting from break-up of Ne²⁺ along the repulsive II(1/2)_g potential were measured in coincidence by means of COLd Target Recoil Ion Momentum Spectroscopy (COLTRIMS) [2]. The interference pattern in the angular distribution has been found to be governed by the parity of the molecular orbital from which the electron is freed. The electron removed from an ungerade orbital shows constructive interference perpendicular to the molecular axis, whereas the one from a gerade orbital shows destructive interference.

[1] H. D. Cohen, U. Fano, Phys Rev 150, 30-33 (1966).

[2] J. Ullrich et al., Rep. Prog. Phys. 66, 1463 (2003).