Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 13: Posters: Quantum Optics and Photonics I
Q 13.47: Poster
Monday, March 9, 2020, 16:30–18:30, Empore Lichthof
High-resolution spectroscopy of single-molecule vibrational states in solid-state matrices — •Johannes Zirkelbach1, Masoud Mirzaei1, Tobias Utikal1, Stephan Götzinger1,2, and Vahid Sandoghdar1,2 — 1Max Planck Institute for the Science of Light, Erlangen, Germany — 2Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
We demonstrate a method to measure the linewidths of the vibrational levels of molecules at a high resolution. To achieve this, we populate the first excited state of single molecules using a narrow-band pump laser and monitor the depletion of the excited state population as the frequency of a second narrow-band 'dump' laser beam is tuned through the Stokes-shifted transitions to the vibrational levels of the electronic ground state. This allows us to resolve the linewidths of ground-state vibrational levels at a resolution of a few MHz limited by the wavemeter used. We apply this technique to dibenzoterrylene molecules embedded in para-dichlorobenzene and anthracene matrices at cryogenic temperatures down to 20 mK. We aim to search for potentially long-lived states, which might be interesting for coherent quantum operations.