Rostock 2019 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 33: Interaction with strong and short laser pulses

A 33.5: Poster

Donnerstag, 14. März 2019, 16:15–18:15, S Fobau Physik

Towards high-repetition rate laser-driven electron rescattering in the molecular frame. — •Federico Branchi, Mark Mero, Marc J.J. Vrakking, Horst Rottke, Tobias Witting, and Jochen Mikosch — Max-Born-Institut, Berlin

Laser-induced electron diffraction (LIED) is an extension of classical diffraction with electron beams, where the scattering electron is derived from its own molecule by strong-field ionization and accelerated by the oscillating laser field. Since the electron is strongly confined, high current densities can be achieved in the rescattering process. Due to the short de Broglie wavelength and the phase-locking to the cycle of the driving laser, LIED can achieve Ångstrom spatial and attosecond temporal resolution.

While first applications of LIED to the study of molecular dynamics have been reported [1], fundamental aspects, such as the involvement of multiple continua [2], are still under investigation.

Here, we combine a 100 kHz repetition-rate, mid-IR OPCPA laser system at 1550/3100 nm (signal/idler) [3] with a reaction microscope (REMI) to study LIED of polyatomic molecules in the molecular frame. We present the setup and first experimental results.

[1] Wolter et al., Science 354, 308 (2016)

[2] Schell et al., Science Advances 4, eaap8148 (2018)

[3] Merö et al., Opt. Lett. 43, 5246 (2018)