Heidelberg 2015 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics III
Q 62.68: Poster
Donnerstag, 26. März 2015, 17:00–19:00, C/Foyer
Investigating Optical Stability of Silicon Vacancy Centres in Nanodiamonds — •Andrea Kurz1, Lachlan J. Rogers1, Kay D. Jahnke1, Uwe Jantzen1, Clemens Schäfermeier2, Andreas Dietrich1, Fedor Jelezko1, and Alexander Kubanek1 — 1Ulm University, Deutschland — 2Technical University of Denkmark, Denmark
The silicon vacancy colour centre (SiV) in diamond has remarkable properties as single photon emitter. It has a strong zero phonon line that contains 70% of the emitted photons, and only a weak phonon side-band.
Recently SiV centres were found to remain fluorescent in nanodimaonds as small as 1.7nm, which is smaller than any reported nanodiamonds exhibiting nitrogen-vacancy fluorescence. This suggests that SiV is more robust against crystal distortions or surface interactions than the nitrogen vacancy centre(NV) is, and suggests it would make an excellent fluorescent marker for bioimaging. However, we have observed blinking from SiV in nanodiamonds but not from SiV in bulk diamond.
Here we investigate this change in optical stability by examining the effects of various surface treatments on the fluorescence of SiV in nanodiamonds of size 20-200 nm. The procedures are similar to those used previously to study the surface effects of NV centres in nanodiamonds.