Hannover 2010 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 60: Photonics III

Q 60.8: Vortrag

Freitag, 12. März 2010, 12:15–12:30, F 128

Assembly and coupling of diamond nanocrytsals to photonic- and plasmonic nanostructures — •Andreas Schell, Thomas Aichele, and Oliver Benson — Humboldt-Universität zu Berlin, Institut für Physik, Nanooptik, Berlin, Germany

The controlled assembly of single quantum emitters, metal nano-antennas, and micro-resonators to nano-photonic structures are attractive for quantum-optical building blocks in integrated photonic circuits. Surface plasmon polaritons (SPPs) in metal nanoparticles and -wires can concentrate and guide electromagnetic energy in volumes much smaller than the corresponding wavelength, providing intense interaction between light and matter.

We have prepared samples with gold and silver nanowires (NWs) as SPP waveguides. Diamond nanocrystals including NV defect centers as single-photon sources where first optically characterized on a separate substrate. Using the tip of an AFM, the emitter was transferred to the NW sample and placed next to a selected NW with high precision. After excitation, single photon emission directly from the emitter, as well as from each end of the NW was observed, confirming the excitation of single SPP in the waveguide. In further steps, the same emitter was moved to various locations with respect to the NW, in order to test the local plasmonic coupling. In this way, the behavior of one emitter in variable model configurations could be studied, while excluding effects arising from inhomogeneous distributions when using several emitters. The composition of more complex systems of metal nanostructures and single quantum-emitters will be discussed, as well.