Bonn 2025 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 49: Poster – Photonics, Lasers, and Applications

Q 49.22: Poster

Mittwoch, 12. März 2025, 17:00–19:00, Tent

Cryogenic spectroscopy of single molecules in the blue wavelength region — •Tianyu Fang, Ricardo Alvarez, Babak Behjati, Max Masuhr, Bo Deng, Delia Siedenberg, Kathrin Schumacher, and Daqing Wang — Institut für Angewandte Physik, Universität Bonn, Bonn, Germany

Various polycyclic aromatic hydrocarbon (PAH) molecules have been studied for quantum optical investigations in the green to near-infrared wavelength range. Detecting narrow-linewidth molecular transitions in the blue wavelength region can open new possibilities for single PAH molecules in quantum optics. Here, we report on fluorescence spectroscopy of perylene molecules in various host-guest systems at cryogenic temperatures. The emission properties of perylene in crystal matrices of anthracene, dibenzothiophene and biphenyl are measured and evaluated. In addition, we report on the detection of single perylene molecules adsorbed on hexagonal boron nitride (hBN) and benchmark their emission linewidth and photostability.

Keywords: single-molecule spectroscopy; polycyclic aromatic hydrocarbon; host-guest systems