Related papers: Cavity-assisted resonance fluorescence from a nitrogen-vacancy center in diamond

Cavity-assisted resonance fluorescence from a nitrogen-vacancy center in diamond

URL: http://arxiv.org/abs/2403.04611v1
Date: Thu, 7 Mar 2024 15:57:57 GMT
Title: Cavity-assisted resonance fluorescence from a nitrogen-vacancy center in diamond
Authors: Viktoria Yurgens and Yannik Fontana and Andrea Corazza and Brendan J. Shields and Patrick Maletinsky and Richard J. Warburton
Abstract summary: The nitrogen-vacancy center in diamond is an attractive resource for the generation of remote entangled states. Here, we couple a nitrogen-vacancy center with a narrow extrinsically broadened linewidth, hosted in a micron-thin membrane, to the mode of an open optical microcavity. The resulting Purcell factor of $sim$1.8 increases the fraction of zero-phonon line photons to above 44%, leading to coherent photon emission rates exceeding four times the state of the art.
Score: 0.0
License: http://creativecommons.org/licenses/by-nc-nd/4.0/
Abstract: The nitrogen-vacancy center in diamond, owing to its optically addressable and long-lived electronic spin, is an attractive resource for the generation of remote entangled states. However, the center's low native fraction of coherent photon emission, $\sim$3\%, strongly reduces the achievable spin-photon entanglement rates. Here, we couple a nitrogen-vacancy center with a narrow extrinsically broadened linewidth (\unit[159]{MHz}), hosted in a micron-thin membrane, to the mode of an open optical microcavity. The resulting Purcell factor of $\sim$1.8 increases the fraction of zero-phonon line photons to above 44\%, leading to coherent photon emission rates exceeding four times the state of the art under non-resonant excitation. Bolstered by the enhancement provided by the cavity, we for the first time measure resonance fluorescence without any temporal filtering with $>$10 signal-to-laser background ratio. Our microcavity platform would increase spin-spin entanglement success probabilities by more than an order of magnitude compared to existing implementations. Selective enhancement of the center's zero-phonon transitions could furthermore unlock efficient application of quantum optics techniques such as wave-packet shaping or all-optical spin manipulation.

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