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Strong coupling between P1 diamond impurity centers and a three-dimensional lumped photonic microwave cavity

Daniel L. Creedon, Jean-Michel Le Floch, Maxim Goryachev, Warrick G. Farr, Stefania Castelletto, and Michael E. Tobar
Phys. Rev. B 91, 140408(R) – Published 24 April 2015

Abstract

We report strong coupling between an ensemble of N impurity (P1) centers in diamond and microwave photons using a unique double-post reentrant cavity. The cavity is designed so that the magnetic component of the cavity field is spatially separated from the electric component and focused into the small volume in which the diamond sample is mounted. The novelty of the structure simultaneously allows the high magnetic filling factor (38.4%) and low frequencies necessary to interact, at low magnetic field, with transitions in diamond such as those in negatively charged nitrogen-vacancy and P1 centers. Coupling strength (or normal-mode splitting) of 51.42 MHz was achieved with P1 centers at 6.18 GHz and 220 mT in a centimeter-scale cavity, with a corresponding cooperativity factor of 4.7. This technique offers an alternative way, with some significant advantages, to couple 3D cavities to transitions in diamond and achieve the strong coupling necessary for applications to quantum information processing.

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  • Received 11 December 2014
  • Revised 1 February 2015

DOI:https://doi.org/10.1103/PhysRevB.91.140408

©2015 American Physical Society

Authors & Affiliations

Daniel L. Creedon1, Jean-Michel Le Floch1, Maxim Goryachev1, Warrick G. Farr1, Stefania Castelletto2, and Michael E. Tobar1,*

  • 1ARC Centre of Excellence for Engineered Quantum Systems, School of Physics, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia
  • 2School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, Melbourne, Victoria 3000, Australia

  • *michael.tobar@uwa.edu.au

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Issue

Vol. 91, Iss. 14 — 1 April 2015

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