1. Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
2. Institute of Physics, Martin Luther University Halle−Wittenberg, Von-Danckelmann-Platz 3, 06120 Halle, Germany
3. Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), 76021 Karlsruhe, Germany
4. Center for Light−Matter Interaction, Sensors & Analytics (LISA+), University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany