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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/23277

Title: Enhanced photoelectric detection of NV magnetic resonances in diamond under dual-beam excitation
Authors: Bourgeois, Emilie
Londero, E.
Buczak, K.
Hruby, Jaroslav
Gulka, Michal
Balasubramaniam, Yaso
Wachter, G.
Stursa, J.
Dobes, K.
Aumayr, F.
Trupke, M.
Gali, A.
Nesladek, Milos
Issue Date: 2017
Publisher: AMER PHYSICAL SOC
Citation: PHYSICAL REVIEW B, 95(4) (Art N° 041402)
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 similar to 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.
Notes: [Bourgeois, E.; Nesladek, M.] IMEC, IMOMEC Div, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. [Bourgeois, E.; Hruby, J.; Gulka, M.; Balasubramaniam, Y.; Nesladek, M.] Hasselt Univ, IMO, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. [Londero, E.; Gali, A.] Hungarian Acad Sci, Inst Solid State Phys & Opt, Wigner Res Ctr Phys, POB 49, H-1525 Budapest, Hungary. [Buczak, K.; Wachter, G.; Trupke, M.] TU Wien, Vienna Ctr Quantum Sci & Technol, Atominst, A-1020 Vienna, Austria. [Stursa, J.] ASCR, Inst Phys Nucl, Vvi, CZ-25068 Rez, Czech Republic. [Dobes, K.; Aumayr, F.] TU Wien, Inst Appl Phys, Wiedner Hauptstr 8-10, A-1040 Vienna, Austria. [Gali, A.] Budapest Univ Technol & Econ, Dept Atom Phys, Budafoki Ut 8, H-1111 Budapest, Hungary.
URI: http://hdl.handle.net/1942/23277
DOI: 10.1103/PhysRevB.95.041402
ISI #: 000392074700001
ISSN: 2469-9950
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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