Hannover 2013 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 30: Quantum effects

Q 30.6: Vortrag

Dienstag, 19. März 2013, 15:30–15:45, F 128

Coherent coupling of a single molecule to a plasmonic nanoantenna — •Benjamin A. Gmeiner, Andreas Maser, Tobias Utikal, Stephan Götzinger, and Vahid Sandoghdar — Max Planck Institute for the Science of Light and Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), D-91058 Erlangen, Germany

We report on a new experiment investigating the coherent coupling of single molecules to plasmonic antennas. So far, all experiments in the field of plasmonics have been limited to the study of the enhancement of the excitation, the modification of the spontaneous emission rate, or changes in the angular radiation pattern accessed via the red-shifted fluorescence detection. Theoretical reports [1] predict that striking effects such as transparency (cloaking) or ultrastrong absorption can take place if a light beam interacts coherently with the coupled system of a quantum emitter and a plasmonic structure. We combine cryogenic high-resolution spectroscopy with localization microscopy to identify and study single molecules coupled to gold nanospheres. We report on our latest findings and their interpretation as Fano resonances, which are expected to result from the interference between the broad particle plasmon resonance of the gold nanoparticle and the narrow resonance of the molecule.

[1] X-W. Chen, V. Sandoghdar, M. Agio, Coherent interaction of a metallic structure with a single quantum emitter: from super absorption to cloaking, submitted (arXiv:1211.2152v2)