Regensburg 2013 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 66: Spintronics / Quantum Information: Vacancies in Diamond and SiC (jointly with HL)
TT 66.9: Vortrag
Freitag, 15. März 2013, 11:45–12:00, H14
Tailoring the Diamond: 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 color center (NV) is a spin active defect with a long spin lifetime at room temperature. It is a three level system whose value of the ground state spin can be driven by applying a small microwave field making a NV centre a good candidate as qubit for quantum information purpose. To exploit the splitting of the ground state of the NV the control and the precision of a microwave field applied on a single NV is crucial. So we have successfully coupled the NV to a microwave structures, made of metal, lithographically deposited on the diamond, applying high intensity microwave field improving the addressing of the spin and the driving of the Rabi oscillation of the NV. Besides to directly improve the coupling efficiency from a planar surface we formerly developed a technique to fabricate solid immersion lenses (SILs), using Focus Ion Beam (FIB) system, who geometrically avoid any refraction at the diamond-air interface. Eventually we will create a microwave structure, placed precisely on the nanofabricated SIL coupled to the colour centre. These integrated structures will allow us to handle the spin of the NV centre with very high precision and microwave field intensity.