Mainz 2017 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 20: Poster Session I

A 20.33: Poster

Dienstag, 7. März 2017, 17:00–19:00, P OG1

Attosecond Transient Absorption Spectroscopy of Molecular Core-to-Valence Transitions — •Lorenz Drescher, Geert Reitsma, Martin Galbraith, Tobias Witting, Oleg Kornilov, Marc Vrakking, and Jochen Mikosch — Max-Born-Institut, Berlin, Germany

Transient absorption spectroscopy with attosecond pulses and pulse trains from high harmonic generation has recently become a versatile tool to study ultrafast phenomena, from photochemical dynamics on the femtosecond scale [1] to electron wave-packet dynamics in atoms [2] and molecules [3] on the few-femtosecond to attosecond scale.

Besides the intriguing potential of combining both high spectral and temporal resolution in an attosecond experiment, the study of core-to-valence transitions in the extreme ultraviolet (XUV) to soft X-ray absorption offers a local view into the valence shell dynamics, due to the localization of the initial state's core orbital. This paves the way to study ultrafast correlation driven phenomena from a site-specific point of view.

Here, we present first results and interpretations from our recent study of the attosecond transient absorption spectrum of core-to-valence transitions in a molecular system manipulated by a strong few-cycle near infrared (NIR) laser pulse.

[1] L. Drescher et al., J. Chem. Phys. 145, 011101 (2016); [2] E. Goulielmakis et al., Nature 466, 739-743 (2010); [3] M. Reduzzi et al., J. Phys. B 49, 065102 (2016)