Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 41: Nano-Optics I
Q 41.4: Talk
Wednesday, March 25, 2015, 15:30–15:45, B/gHS
Bulk-like spectral lines from SiV centres nanodiamonds ( ~50nm ) — •Uwe Jantzen1, Kay Jahnke1, Andrea Kurz1, Clemens Schäfermejer1, Valery Davydov2, Viatcheslav Agafonov3, Alexander Kubanek1, Lachlan J. Rogers1, and Fedor Jelezko1 — 1Institut für Quantenoptik, 89081 Ulm, Germany — 2Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow 142190, Russia — 3GREMAN, UMR CNRS-CEA 6157, Université F. Rabelais, 37200 Tours, France
The silicon vacancy (SiV) center in bulk diamond is known to have outstanding optical properties. Its strong zero-phonon line (ZPL) contains 70% of the total fluorescence and exhibits lifetime-limited linewidths. Additionally, SiV seems immune to spectral diffusion. These properties make it a promising candidate for quantum information processing. Many applications aim to utilize this color center in nanodiamonds, however this changes the optical properties due to surface effects and distortions in the lattice structure. Even the best reported SiV in nanodiamonds have ZPL features ten times broader than measured in bulk diamond. Here we report SiV centres in ~50nm nanodiamonds which exhibit excitation linewidths of 240MHz at 4K (less than double the bulk-diamond results). These unique optical properties are probably due to the novel HPHT process used to synthesise the nanodiamonds[1]. [1] Davydov, V. A., et al. (2010) JETP Letters 99, 585*89. doi:10.1134/S002136401410004X