Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 23: Plasmonics and Nanooptics: Light-Matter Interaction, Spectroscopy
O 23.21: Poster
Montag, 7. März 2016, 18:15–20:30, Poster E
Radiation patterns of semiconductor nanocrystals coupled to optical dimer antennas — •Nicolas Coca Lopez1, Annick Hemmerling1, Harald Budde1, Francesca Nicoli2, Tao Zhang2, Mauricio Pilo-Pais2, Tim Liedl2, and Achim Hartschuh1 — 1Department of Chemistry, and Center for NanoScience (CeNS), LMU München, Germany — 2Department of Physics, and Center for NanoScience (CeNS), LMU München, Germany
Optical antennas can be used to manipulate the coupling between emitters and the radiation field leading to changes in the rate and direction of spontaneous emission [1,2]. Here we study single semiconductor nanocrystals (NC) enclosed at the feed-point of plasmonic dimer antennas formed by DNA-based self-assembly [3]. Radiation patterns recorded by back-focal plane (BFP) imaging of the photoluminescence (PL) emission of single NC-antenna systems show the antenna directivity and the spontaneous emission rate enhancement. Quantitative model calculations of the BFP patterns are carried out to determine the coupling strength of the different transition dipole moment orientations in the NC to the antenna resonance.
[1] Bharadwaj, P. et al., Adv. Opt. Photon. 1, 438 - 483, (2009).
[2] Curto, A. G. et al., Science 329, 930 - 933, (2010).
[3] Kuzyk, A. et al., Nature 483, 311 - 314, (2012).