SAMOP 2021 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 7: Poster 1

MO 7.24: Poster

Donnerstag, 23. September 2021, 17:30–19:30, P

Observation of long-lived electronic coherences at room temperature in lanthanide-complexes — •Mirali Gheibi, Jayanta Ghosh, Cristian Sarpe, Bastian Zielinski, Tillmann Kalas, Elena Ramela Ciobotea, Arne Senftleben, Thomas Baumert, and Hendrike Braun — Institute of Physics and CINSaT, University of Kassel, Heinrich-Plett-Strasse 40, 34132 Kassel, Germany

The aim of SMolBits -Scalable Molecular Quantum Bits - is the realization of ideal quantum systems with long-lived levels, isolated from the environment to form quantum bits as key building blocks for advanced quantum technologies. Lanthanides are particularly promising with respect to possible applications in quantum-based information storage because their energy levels and electronic states are barely influenced by the environment and bonds to ligands attached to the lanthanides. We are investigating the electronic coherences resonantly excited in lanthanide complexes by interaction with IR femtosecond laser pulses and their lifetimes using phase-locked double pulses and fluorescence detection under a confocal microscope. We observe an electronic coherence time of more than 600 fs for three different complexes containing Neodymium for the excitation from its ground state ⁴ I_9/2 to the states ⁴ F_5/2 and ² H_9/2. Furthermore, characteristics of the electronic wave packet created in the excited states are imprinted onto the coherence signal. Currently we are studying Rabi oscillations in these complexes. As a next step we will investigate the influence of spectrally phase shaped femtosecond laser pulses in the non-perturbative regime onto the electronic excitation and the created coherence.