Tunable cavity coupling of the zero phonon line of a nitrogen-vacancy defect in diamond. (16th December 2015)

• Record Type: Journal Article
• Authors: Johnson, S; Dolan, P R; Grange, T; Trichet, A A P; Hornecker, G; Chen, Y C; Weng, L; Hughes, G M; Watt, A A R; Auffèves, A; Smith, J M
• Is Part Of: New journal of physics. Volume 17:Number 12(2015:Dec.)
• Publication Date: 2015-12-16
• Subjects: microcavities -- purcell effect -- weak coupling -- nitrogen-vacancy -- diamond; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/17/12/122003
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: We demonstrate the tunable enhancement of the zero phonon line of a single nitrogen-vacancy colour centre in diamond at cryogenic temperature. An open cavity fabricated using focused ion beam milling provides mode volumes as small as 1.24 μ m 3 (4.7 ) and quality factor In situ tuning of the cavity resonance is achieved with piezoelectric actuators. At optimal coupling to a TEM00 cavity mode, the signal from individual zero phonon line transitions is enhanced by a factor of 6.25 and the overall emission rate of the NV − centre is increased by 40% compared with that measured from the same centre in the absence of cavity field confinement. This result represents a step forward in the realisation of efficient spin-photon interfaces and scalable quantum computing using optically addressable solid state spin qubits.