Heidelberg 2015 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics III
Q 62.59: Poster
Donnerstag, 26. März 2015, 17:00–19:00, C/Foyer
Modification of the radiative properties of a single emitter by a gold nanocone — •Korenobu Matsuzaki1, Simon Vassant1, Björn Hoffmann1, Silke Christiansen1,2, Stephan Götzinger3,1, and Vahid Sandoghdar1,3 — 1Max Planck Institute for the Science of Light, Erlangen, Germany — 2Helmholtz Centre for Materials and Energy, Berlin, Germany — 3Friedrich Alexander University of Erlangen-Nürnberg, Erlangen, Germany
Plasmonic antennas can dramatically modify the radiative properties of quantum emitters. Recently, we have studied gold nanocones as particularly efficient antenna structures [1]. In the present experimental study, we systematically investigated the optical properties of gold nanocones fabricated by focused ion beam milling. Then, we coupled a single colloidal quantum dot attached to a glass fiber tip, which could be placed in the near field of the nanocone with nanometer accuracy. We present our results concerning fluorescence lifetime reduction larger than 300 times and a strong emission redirection by the nanocones [2]. Furthermore, we investigate the effect of the plasmonic antenna on the basic photophysics of the quantum dot.
[1] X.-W. Chen, M. Agio, and V. Sandoghdar, Phys. Rev. Lett. 108, 233001 (2012). [2] S. Vassant, B. Hoffmann, K. Matsuzaki, X.-W. Chen, S. Christiansen, S. Götzinger, and V. Sandoghdar, in preparation.