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Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 56: Plasmonics & Nanooptics IV: Materials Science and Chemistry Applications (joint session O/CPP)

O 56.8: Vortrag

Mittwoch, 3. April 2019, 16:45–17:00, H8

Watching a single fluorophore molecule walk into a plasmonic hotspotLing Xin1,2, •Mo Lu3, Steffen Both4, Markus Pfeiffer3, Maximilian J. Urban1,2, Chao Zhou1,2, Hao Yan5, Thomas Weiss4, Na Liu1,2, and Klas Lindfors31Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart, Germany — 2Kirchhoff Institute for Physics, Heidelberg University, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany — 3Department of Chemistry, University of Cologne, Luxemburger Straße 116, 50939 Köln, Germany — 44th Physics Institute and Stuttgart Research Center of Photonic Engineering, University of Stuttgart, 70569 Stuttgart, Germany — 5Department of Chemistry & Biochemistry, Biodesign Institute, Arizona State University, Tempe, AZ 85287-5601, USA

Plasmonic nanoantennas allow for enhancing the spontaneous emission, altering the emission polarization, and shaping the radiation pattern of quantum emitters. A critical challenge for the experimental realizations is positioning a single emitter into the hotspot of a plasmonic antenna with nanoscale accuracy. We demonstrate a dynamic light-matter interaction nanosystem enabled by the DNA origami technique. A single fluorophore molecule can autonomously and unidirectionally walk into the hotspot of a plasmonic nanoantenna along a designated origami track. Successive fluorescence intensity increase and lifetime reduction are in situ monitored using single-molecule fluorescence spectroscopy. Our scheme offers a dynamic platform, which can be used to develop functional materials, investigate intriguing light-matter interaction phenomena as well as to serve as examine theoretical models.

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