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Q: Fachverband Quantenoptik und Photonik

Q 35: Poster I

Q 35.54: Poster

Dienstag, 19. März 2013, 16:00–18:30, Empore Lichthof

Spectral diffusion measurements on the zero phonon line of single nitrogen-vacancy centers diamond — •Niko Nikolay, Max Strauß, Nikola Sadzak, Janik Wolters, and Oliver Benson — Humboldt Universität zu Berlin, Nano-optics, Berlin, Germany

Nitrogen-vacancy (NV) centers in diamond have proven to be a promising resource for quantum technology. In particular, the NV center in bulk diamond is attractive as a source of indistinguishable single photons, as it provides a narrow zero phonon line (ZPL) at the optical 3A * 3E transition at 638 nm [1]. Furthermore the ZPL can be used for spin measurements and entanglement experiments [2]. However, fast fluctuations of the transition line, known as spectral diffusion are a major problem. Performing photon-correlation interferometry measurements [3] we determine the time-scale of the spectral diffusion and gain further knowledge about the underlying processes in bulk diamond, as well as in nano diamonds. In the future, our results will help to tackle the problem of spectral diffusion of NV centers in diamond.

[1] Two-Photon Quantum Interference from Separate Nitrogen Vacancy Centers in Diamond, H. Bernien et al., Physical Review Letters 108, 1*5 (2012).

[2] Quantum entanglement between an optical photon and a solid-state spin qubit, E. Togan et al., Nature 466, 730*4 (2010).

[3] Measurement of the ultrafast spectral diffusion of the optical transition of nitrogen vacancy centers in nano- size diamond using correlation interferometry, J. Wolters et al., Physical Review Letters, in press, arXiv:1206.0852.