Michael Geiselmann, Mathieu Juan, Jan Renger, Jana M. Say, Louise J. Brown, F. Javier García de Abajo, Frank Koppens, Romain Quidant
Nitrogen vacancy (NV) centers in diamond are a promising basis for quantum information processing schemes, stable single-photon generation, and high-resolution probing of their local environment. In particular, the NV electric dipole and electronic spin can be exploited as ideal probes of electromagnetic fields with unprecedented sensitivity [1-7]. Yet, fully exploiting the positioning and sensing capability of single NV centers requires strategies to accurately manipulate them in three dimensions (3D). Here, we report on deterministic trapping of single nano-diamonds containing individual NV-centers using optical tweezers [8]. We demonstrate 3D spatial manipulation of a single NV center with nanoscale resolution, and find that the NV axis is nearly fixed inside the trap. We exploit this stable trapping to perform both coherent manipulation of the NV spin and fluorescent lifetime measurements near an integrated photonic system. This proves an optically trapped NV center as a viable system for 3D vectorial magnetometry and sensing of the local density of optical states.
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http://arxiv.org/abs/1207.0650
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