Mainz 2017 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 6: Theory of Molecular Dynamics
MO 6.1: Hauptvortrag
Dienstag, 7. März 2017, 11:00–11:30, N 25
Illuminating Molecular Symmetries with Bicircular High-Order-Harmonic Generation — •Daniel M. Reich1,2 and Lars Bojer Madsen1 — 1Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark — 2Theoretische Physik, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
High-order-harmonic generation (HHG) represents one of the primary gateways towards obtaining novel tabletop light sources with unique properties for a wide range of applications. In this work we present a general theory of bicircular HHG from N-fold rotationally symmetric molecules.
Using a rotating frame of reference we predict the complete structure of the high-order-harmonic spectra for arbitrary driving frequency ratios and show how molecular symmetries can be directly identified from the harmonic signal. Our findings reveal that a characteristic fingerprint of rotational molecular symmetries can be universally observed in the ultrafast response of molecules to strong bicircular fields pointing towards the possibility of ultrafast readout of molecular symmetries in, e.g., chemical reactions.