Regensburg 2013 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 90: Poster Session: Quantum information systems; Optical properties; Ultrafast phenomena

HL 90.2: Poster

Thursday, March 14, 2013, 16:00–20:00, Poster A

Optical superresolution microscopy of individual spin defects in diamond — •Matthias Pfender, Nabeel Aslam, Gerald Waldherr, Philipp Neumann, and Jörg Wrachtrup — 3. Physikalisches Institut, Universität Stuttgart, Germany

The nitrogen-vacancy defect center in diamond is one of the major candidates for a room temperature quantum processor. By optical microscopy the quantum state of individual defects can be readout and initialized. This includes charge states as well as electron and nuclear spin states. As the spins associated with the NV center possess favorable coherence properties first quantum information tasks have already been implemented. In addition to quantum information processing this spin system is also applied for metrology purposes (i.e. nanoscale sensing of magnetic and electric fields as well as temperature). When the average distance of NV centers in these quantum devices is decreased below the diffraction limit individual addressing becomes challenging. Here we demonstrate a novel method for farfield optical superresolution imaging of NV centers with a resolution below 10 nm which is applicable to dense clusters of defects. Our method exploits recent novel insight into the charge state dynamics of this defect. Furthermore, additional spin manipulation allows for further resolution improvements and nanoscale metrology without the need for scanning probe techniques.