DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2024 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 91: Scanning Probe Microscopy: Light Matter Interaction at Atomic Scales III

O 91.6: Vortrag

Donnerstag, 21. März 2024, 16:30–16:45, MA 041

Gating single-molecule photoluminescence with electrons — •Anna Rosławska1,2, Katharina Kaiser1,3, Michelangelo Romeo1, Fabrice Scheurer1, and Guillaume Schull11Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France — 2Max-Planck-Institut für Festkörperforschung, D-70569, Stuttgart, Germany — 3IV. Physikalisches Institut, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen

The ability to switch an optically-active molecule from a bright to a dark state by modifying its redox state is one of the most striking modifications of optical properties of a chromophore. Here, we show that this mechanism can be applied to a single molecule located in the double barrier tunneling junction of a scanning tunneling microscope (STM). We achieve nearly full tip-enhanced photoluminescence (TEPL) quenching by controlling the population of a transiently charged state by adjusting the tip-molecule distance, the applied bias voltage, and the in-plane position of the tip with respect to the molecule. This versatile gating of the fluorescence yield of a single molecule with sub-nm precision is explained using a straightforward many-body description of our system.

Keywords: STM; tip-enhanced photoluminescence; single-molecule optics; phthalocyanine

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2024 > Berlin