Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 27: Poster: Attosecond physics

A 27.3: Poster

Mittwoch, 25. März 2015, 17:00–19:00, C/Foyer

Core hole spectroscopy with XUV-initiated high harmonic generation — Doron Azoury, •Michael Krüger, Barry D. Bruner, and Nirit Dudovich — Weizmann Institute of Science, Rehovot 76100, Israel

High-harmonic spectroscopy is a powerful tool to image atomic and molecular structure on angstrom length and attosecond time scales (see, e.g., [1]). However, conventional high-harmonic generation (HHG) that employs tunneling ionization can only adress orbitals belonging to outer shell states. In XUV-initiated HHG, the tunneling ionization step is replaced by photoionization of electrons by an XUV attosecond pulse [2]. This enables the excitation of inner-shell electrons and core holes. The induced inner-shell dynamics can then be probed by the liberated electron which is brought to recollision by an infrared laser field at a well-defined time instant [3]. The technique should be applicable not only to atomic, but also to complex molecular targets such as hydrocarbons. Here we detail our setup for a proof-of-principle XUV-pump IR-probe experiment and report on its current status.

[1] O. Smirnova et al., Nature 460, 972 (2009).

[2] G. Gademann et al., NJP 13, 033002 (2011).

[3] J. Leeuwenburgh et al., PRL 111, 123002 (2013).