Stuttgart 2012 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 19: Quanteninformation: Festkörper und Photonen
Q 19.5: Vortrag
Montag, 12. März 2012, 17:30–17:45, V38.04
Microwave structures surrounding nano-fabricated solid immersion lenses registered to single emitters in diamond on demand — •Luca Marseglia1, Florian Striebel1, Andreas Häußler1, Boris Naydenov1, Jan Meijer2, and Fedor Jelezko1 — 1Institut für Quantenoptik, Universität Ulm, Albert-Einstein-Allee 11, 89081 Ulm - Germany — 2Ruhr-Universität Bochum, Universitätsstraße 150, 44801, Bochum, Germany
The negatively charged Nitrogen Vacancy colour centre (NV) is a spin active defect with a long spin lifetime at room temperature. It is a three level system which ground state spin can be efficiently readout and controlled at the single atom level. In addition, long coherence time associated with single spin in spin-free diamond lattice make this centre an excellent candidate as qubit for quantum information purpose. To the whole power of the NV the control we aim to have a microwave structures precisely positioned on the colour centre. Furthermore, in order to improve the optical detection of single spins we formerly developed a technique to fabricate solid immersion lenses (SILs), using Focus Ion Beam (FIB) system, that allows to avoid any refraction at the diamond-air interface. Using combination of lithography and FIB technologies we will create a microwave circuit surrounding the SIL, previously etched and coupled to the colour centre in the diamond on demand. This allows us to increase the collection of the light from the NV centre and in the same time to drive the splitting of its ground state, in a precise, scalable integrated way.