High Harmonic Generation Interferometry (Prof. Nirit Dudovich)
High Harmonic Generation Interferometry
- Datum: 15.01.2019
- Uhrzeit: 14:30
- Vortragende(r): Prof. Nirit Dudovich
- Atto Science Group, Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot, Israel
- Ort: Max-Planck-Institut für Quantenoptik
- Raum: Hörsaal, Raum B 0.32 / New lecture hall, Room B 0.32
- Gastgeber: Max Planck Institute of Quantum Optics
An important aspect of HHG spectroscopy lies in its coherent nature. The strong field interaction directly transfers the coherence of the strong laser field into the coherent properties of the electronic wavefunction, and then back into the optical properties of the emitted harmonics. Resolving the internal coherent is one of the primary challenges in HHG spectroscopy – serving as the key step in our ability to reconstruct the internal dynamics.
As in many other branches in Physics, coherence is resolved via interferometry. In the talk I will describe advanced schemes in attosecond spectroscopy where the interferometric measurement is induced during the interaction itself. When the strong field interaction is driven by two, or several synchronized fields, it induces an internal interferometer, composed of several quantum paths. Furthermore, this scheme provides a direct insight into the multidimensional nature of the interaction, thus revealing its complexity. In an alternative approach we demonstrate how the HHG coherence can be directly resolved via an all-optical approach. In this case, we replace the internal interferometer, by an external optical one, and obtain a direct insight into the photoionization mechanism.