Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 37: Poster: Twisted light and particles (SYTL)

A 37.1: Poster

Donnerstag, 26. März 2015, 17:00–19:00, C/Foyer

Photoionization of the hydrogen molecular ion by twisted light — •Anton Peshkov1, Stephan Fritzsche1,2, and Andrey Surzhykov11Helmholtz-Institut Jena, Germany — 2Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, Germany

During the last decades the photoionization of diatomic molecules has been studied intensively in both experiment and theory. In these studies special attention has been paid to the interference between electrons emitted from either of two atomic centers of molecule. This interference leads to the oscillatory behavior of the angular-differential cross section similar to what was observed in the Young’s double-slit experiment. Up to the present the Young-type ionization studies have been performed mainly with a plane wave incident radiation. However, owing to the recent developments in optics the photoionization of diatomic molecules can be explored also by using the twisted light beams. These beams are designed to carry a non-zero projection of the orbital angular momentum (OAM) onto to their propagation direction and can be produced with energies up to 100 eV. In this contribution we have investigated the interaction of aligned molecules with twisted Bessel light. Analysis is performed within the nonrelativistic framework and the first Born approximation. Detailed calculations have been performed for the hydrogen molecular ion H2+, whose electronic wave function was constructed as a linear combination of atomic orbitals. Results of these calculations indicate that the angular-differential cross section is sensitive to the position of the molecule within the wave-front as well as to the OAM and polarization of incident radiation.

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