Darmstadt 2008 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 50: Poster Ultrakalte Atome

Q 50.2: Poster

Thursday, March 13, 2008, 16:30–19:00, Poster C2

Optical Spectroscopy On Trapped Nanoparticles — •Alexander Kuhlicke, Stefan Schietinger, and Oliver Benson — AG Nano-Optik, Institut für Physik, Humboldt-Universität zu Berlin, Hausvogteiplatz 5-7, 10117 Berlin

Linear radio frequency ion traps, so-called Paul traps, became widely used tools for high-resolution spectroscopy because of the absent interaction between particles and supporting surfaces or other particles. With their help it was possible to build up quantum registers and implement first operations for quantum computing. Also trapping of micrometer-sized particles in larger traps was demonstrated. Until today not much work was done for trapping particles in the span between these two size regimes of few atoms and microscopic particles. We have narrowed the gap by trapping single nanoparticles with sizes down to 20 nm within a linear Paul trap. We observed Coulomb crystals within the trap and performed spectroscopy on single trapped dye-doped particles and N-V centers in nanodiamonds. Future experiments aim at the spectroscopy of single quantum emitters revealing their interaction with a mesoscopic environment.