Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 70: Quantum Optics and Control II
Q 70.6: Vortrag
Freitag, 6. März 2026, 12:30–12:45, P 3
Towards coherent dipole-dipole coupling of molecular dimers — •Dinesh Reddy1,2, Ashley Shin1, Tim Hebenstreit1,2, Siwei Luo1,2, Mikhail Kalinin3, Alexander Oshchepkov3, Jan Renger1, Tobias Utikal1, Konstantin Amsharov3, Vahid Sandoghdar1,2, and Stephan Götzinger1,2 — 1Max Planck Institute for the Science of Light, Erlangen, Germany — 2Department of Physics, Friedrich Alexander University Erlangen-Nuremberg, Erlangen, Germany — 3Department of Organic Chemistry, Martin-Luther-University Halle-Wittenberg, Halle(Saale), Germany
Coherent coupling between two quantum emitters via their optical near-field gives rise to the formation of sub- and superradiant entangled states. It can be experimentally challenging to optically confirm such coupling, as it typically requires emitters to be separated by only a few nanometers. We adopt a bottom-up synthetic approach, leveraging precise molecular engineering to tune the inter-emitter distance using tailored organic linkers. Our study focuses on single-molecule spectroscopy of dibenzanthanthrene (DBATT) that has shown to have high quantum yield and lifetime-limited linewidths at cryogenic temperatures (<2.2K). By functionalizing DBATT with various linker groups, we construct isolated monomers with linkers as well as dimers. We utilize a tunable narrow-band CW laser to obtain near lifetime-limited fluorescence excitation spectra as well as emission spectra with high spectral resolution to distinguish the effects of chemical functionalization from strong coupling. Additionally, we report autocorrelation and inhomogeneous broadening of all DBATT species.
Keywords: Quantum Emitters; Single-Molecule Spectroscopy; Coherent Coupling; Superradiance/Subradiance; Dibenzanthanthrene (DBATT)