Hannover 2016 – scientific programme

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A: Fachverband Atomphysik

A 25: Interaction with strong or short laser pulses II

A 25.4: Talk

Wednesday, March 2, 2016, 15:30–15:45, f107

Towards Ionization Channel-Resolved Electron Rescattering in the Molecular Frame — •Felix Schell, Federico Furch, Serguei Patchkovskii, Marc Vrakking, Claus Peter Schulz, and Jochen Mikosch — Max Born Institute, Berlin, Germany

In laser-induced electron diffraction (LIED), the field of an intense fs laser pulse first ionizes a molecule and then accelerates the released electron back to the core, where an elastic scattering event can imprint structural information on the electron [1]. However, for polyatomic molecules, multiple continua originating from the ionization of states lying lower than the HOMO are expected to contribute to the signal of diffracted electrons and thus complicate the interpretation of LIED experiments. In order to separate contributions to electron rescattering from multiple channels, we extend the CRATI technique [2]. We align 1,3-butadiene molecules non-adiabatically using an 800nm laser pulse and drive strong-field ionization and electron rescattering with a subsequent laser pulse at 1.3µm. A reaction microscope is used to acquire electron momentum maps in coincidence with the parent ion and its fragments. Recording these maps in the molecular frame while varying the driving light’s ellipticity is expected to yield insight into the shape of the electron continuum wavepackets emerging from different orbitals.

[1] Blaga et al., Nature 483, 194 (2012).

[2] Boguslavskiy et al., Science 335, 1336 (2012).