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Enhanced photoelectric detection of NV magnetic resonances in diamond under dual-beam excitation

E. Bourgeois, E. Londero, K. Buczak, J. Hruby, M. Gulka, Y. Balasubramaniam, G. Wachter, J. Stursa, K. Dobes, F. Aumayr, M. Trupke, A. Gali, and M. Nesladek
Phys. Rev. B 95, 041402(R) – Published 17 January 2017
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Abstract

The core issue for the implementation of NV center qubit technology is a sensitive readout of the NV spin state. We present here a detailed theoretical and experimental study of NV center photoionization processes, used as a basis for the design of a dual-beam photoelectric method for the detection of NV magnetic resonances (PDMR). This scheme, based on NV one-photon ionization, is significantly more efficient than the previously reported single-beam excitation scheme. We demonstrate this technique on small ensembles of 10 shallow NVs implanted in electronic grade diamond (a relevant material for quantum technology), on which we achieve a cw magnetic resonance contrast of 9%—three times enhanced compared to previous work. The dual-beam PDMR scheme allows independent control of the photoionization rate and spin magnetic resonance contrast. Under a similar excitation, we obtain a significantly higher photocurrent, and thus an improved signal-to-noise ratio, compared to single-beam PDMR. Finally, this scheme is predicted to enhance magnetic resonance contrast in the case of samples with a high proportion of substitutional nitrogen defects, and could therefore enable the photoelectric readout of single NV spins.

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  • Received 8 July 2016
  • Revised 9 November 2016

DOI:https://doi.org/10.1103/PhysRevB.95.041402

©2017 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & Technology

Authors & Affiliations

E. Bourgeois1,2,*, E. Londero3, K. Buczak4, J. Hruby2, M. Gulka2, Y. Balasubramaniam2, G. Wachter4, J. Stursa5, K. Dobes6, F. Aumayr6, M. Trupke4, A. Gali3,7, and M. Nesladek1,2,†

  • 1IMOMEC Division, IMEC, Wetenschapspark 1, B-3590 Diepenbeek, Belgium
  • 2Institute for Materials Research (IMO), Hasselt University, Wetenschapspark 1, B-3590 Diepenbeek, Belgium
  • 3Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, PO Box 49, H-1525 Budapest, Hungary
  • 4Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, A-1020 Vienna, Austria
  • 5Nuclear Physics Institute, v.v.i., ASCR, CZ-25068 Rez, Czech Republic
  • 6Institute of Applied Physics, TU Wien, Wiedner Hauptstrasse 8-10, A-1040 Vienna, Austria
  • 7Department of Atomic Physics, Budapest University of Technology and Economics, Budafoki út 8, H-1111 Budapest, Hungary

  • *emilie.bourgeois@uhasselt.be
  • milos.nesladek@uhasselt.be

See Also

Efficient Electrical Spin Readout of NV Centers in Diamond

Florian M. Hrubesch, Georg Braunbeck, Martin Stutzmann, Friedemann Reinhard, and Martin S. Brandt
Phys. Rev. Lett. 118, 037601 (2017)

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Vol. 95, Iss. 4 — 15 January 2017

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