Dresden 2014 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 106: Poster: Spintronics (with MA/O)

HL 106.6: Poster

Donnerstag, 3. April 2014, 17:00–20:00, P1

Coherence Properties of Nitrogen Vacancy Centers in Nano Diamond — •Bernd Sontheimer, Niko Nikolay, Max Strauß, Andreas W. Schell, Janik Wolters, and Oliver Benson — Humbold Universität zu Berlin, Institut für Physik AG Nano-Optik, Newtonstr. 15, 12489 Berlin

The nitrogen vacancy (NV) center in diamond is a stable single photon emitter, combining optical transitions with a long-lived electronic spin with excellent coherence properties [1]. NV centers in nano diamonds are of special interest due to their integrability in photonic hybrid devices [2]. In our research we examine the coherence properties of nano diamonds based on optically detected magnetic resonance (ODMR) [3]. In particular the influence of surface treatments on the T2 time is examined via spin-echo experiments [4]. Also a change of spectral diffusion is determined using correlation interferometry.

[1] G. Balasubramanian, et al., Ultralong spin coherence time in isotopically engineered diamond. Nat. Mater. 8, 383 (2009).

[2] J. Wolters, et al., Enhancement of the zero phonon line emission from a single nitrogen vacancy center in a nanodiamond via coupling to a photonic crystal cavity. Appl. Phys. Lett. 97, 141108 (2010).

[3] J. Wolters, et al., Measurement of the Ultrafast Spectral Diffusion of the Optical Transition of Nitrogen Vacancy Centers in Nano-Size Diamond Using Correlation Interferometry. Phys. Rev. Lett. 110, 027401 (2013).

[4] F. Jelezko, et al., Observation of Coherent Oscillations in a Single Electron Spin. Phys. Rev. Lett. 92, 076401 (2004).

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