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arXiv · 1408.4117

A low-loss, broadband antenna for efficient photon collection from a coherent spin in diamond

D. Riedel·D. Rohner·M. Ganzhorn·T. Kaldewey·P. Appel·E. Neu·R. J. Warburton·P. Maletinsky
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Abstract

We report the creation of a low-loss, broadband optical antenna giving highly directed output from a coherent single spin in the solid-state. The device, the first solid-state realization of a dielectric antenna, is engineered for individual nitrogen vacancy (NV) electronic spins in diamond. We demonstrate a directionality close to 10. The photonic structure preserves the high spin coherence of single crystal diamond (T2>100us). The single photon count rate approaches a MHz facilitating efficient spin readout. We thus demonstrate a key enabling technology for quantum applications such as high-sensitivity magnetometry and long-distance spin entanglement.

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D. Riedel, D. Rohner, M. Ganzhorn, T. Kaldewey, P. Appel, E. Neu, R. J. Warburton, P. Maletinsky. 2014-08-18. A low-loss, broadband antenna for efficient photon collection from a coherent spin in diamond. https://doi.org/10.1103/physrevapplied.2.064011

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