Hannover 2020 – scientific programme

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A: Fachverband Atomphysik

A 19: Interaction with strong or short laser pulses II

A 19.8: Talk

Wednesday, March 11, 2020, 16:00–16:15, f107

Polarization Shaping of High Harmonics generated by structured laser pulses — •Jonas Wätzel and Jamal Berakdar — Martin-Luther-Universität Halle-Wittenberg, Institut für Physik, Halle (Saale)

High-order harmonic generation (HHG) from atoms driven by IR vector beams and beams carrying orbital momentum has been demonstrated experimentally [1]. Here we show how a spatiotemporal shaping of the pulse allows to imprint locally circular polarization onto the emitted radiation. As shown analytically and numerically, the time-dependent Stokes parameters, representing the ratio between linear and circular polarization can be controlled by simply tuning the parameters of the IR field. The proposed scheme offers a method for a full polarization control of the emitted HHG by only one input light field.

[1] Carlos Hernández-Garcia et al. "Extreme ultraviolet vector beams driven by infrared lasers", Optica 4, 520-526 (2017)