Dresden 2014 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 107: Quantum Information Systems II (organized by HL)

TT 107.3: Talk

Friday, April 4, 2014, 10:00–10:15, POT 151

Silicon Vacancies in Silicon Carbide as a Vector Magnetometer — •Dmitrij Simin¹, Franziska Fuchs¹, Hannes Kraus¹, Victor Soltamov², Andreas Sperlich¹, Pavel Baranov², Georgy Astakhov¹, and Vladimir Dyakonov¹ — ¹Experimental Physics VI, Julius Maximilian University of Würzburg, 97074 Würzburg, Germany — ²Ioffe Physical-Technical Institute, 194021 St. Petersburg, Russia

The determination of both the magnitude and orientation of ambient magnetic fields has become a crucial convenience and safety factor in smartphones, spacecrafts, and satellites. Due to severe requirements for these devices, including compactness, temperature stability, and inexpensive fabrication, there are few devices that meet them all. In this study, we present a new approach, utilizing the spin properties of the silicon vacancies in silicon carbide [1]. Using room temperature optically detected magnetic resonance [2], we measure the change in optical emission due to vacancy specific electronic transitions that are dependent on the magnitude as well as on the direction of the external magnetic field. Using these relationships, we show how silicon carbide can be used as a compact and cost-effective solution for vector magnetometry applications with a good accuracy.

[1]Riedel et al.: Phys. Rev. Lett. 109, 226402 (2012)

[2]Kraus et al.: Nat. Phys., DOI 10.1038/nphys2826 (2013)