Regensburg 2019 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 42: Plasmonics IV (joint session O/CPP)
CPP 42.8: Vortrag
Mittwoch, 3. April 2019, 16:45–17:00, H8
Watching a single fluorophore molecule walk into a plasmonic hotspot — Ling Xin1,2, •Mo Lu3, Steffen Both4, Markus Pfeiffer3, Maximilian J. Urban1,2, Chao Zhou1,2, Hao Yan5, Thomas Weiss4, Na Liu1,2, and Klas Lindfors3 — 1Max 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.