Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 39: Poster: Quantum Optics and Photonics II
Q 39.7: Poster
Dienstag, 6. März 2018, 16:15–18:15, Zelt Ost
Single Silicon-Vacancy centre with improved spectral stability in nanodiamonds — •Ou Wang1, Lachlan Rogers2, Andrea Filipovski1, Valery Davydov4, Viatcheslav Agafonov3, Fedor Jelezko1, and Alexander Kubanek1 — 1Institut für Quantenoptik, Ulm Universität, Ulm, Deutschland — 2Department of Physics and Astronomy, Macquarie University, Sydney, Australia — 3Institute for High Pressure Physics, Russian Academy of Science, Moscow, Russia — 4Greman, Universit F. Rabelais, Tours, France
With appealing properties, weak side band and mostly polarized fluorescence, silicon vacancy centers (SiVs) in diamonds have became a promising system for the realization of bright, narrow bandwidth, single-photon sources. In bulk diamond at cryogenic temperatures the SiV ZPL has been observed with a linewidth limited only by fluorescence lifetime, and the transitions were spectrally stable over hours.Unfortunately the spin coherence time was found to be severely limited by phonon processes in the ground state, which may be quenched in small nanodiamonds (NDs).
However, intermittencies in luminescence, as well as significant spectral diffusion were found when investigating SiV in NDs. With surface treatment, we have improved the optical stability of SiV in NDs and gained access to single SiVs in NDs. The spectroscopical measurements on SiV ZPL fine structures showed a wide distribution of tranversial strain in NDs, with which we took a glimpse into the SiV strain model. The possibility of finding bulk-like low strained SiV offered new paths of acquiring indistiguishable photon emissions by SiV in NDs.