Advances in Photonics of Quantum Computing, Memory, and Communication

Towards an efficient spin-photon interface with near-deterministically engineered defects in diamond

Laiyi Weng, Sam Johnson, P. Hill, Hangyu Liu, Yu-chen Chen, Benjamin Griffiths, Shannon S. Nicley, Shazeaa N. Ishmael, Colin J. Stephen, Yashna Lekhai, Ben Green, Aurelien A. P. Trichet, Patrick S. Salter, Martin J. Booth, Erdan Gu, Gavin W. Morley, Mark E. Newton, Jason M. Smith

Published Mar 4, 2019• 0 citations

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Abstract

In this work, we demonstrate two developments, in device and material engineering respectively, towards an efficient spin-photon device using colour centres in diamond for scalable quantum computing networks: firstly, we report the emission enhancement of the coherent zero-phonon-line transistion of an nitrogen vacancy centre in a diamond membrane on coupling to a tunable open-cavity; secondly, we present a new method for deterministic writing of NV arrays in bulk diamond with a 96% yield of single defects, a 50 nm positional accuracy in the image plane, and NV electron spin coherence (T2) times of up to 170 microseconds.

DOI: 10.1117/12.2507298

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