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Q: Fachverband Quantenoptik und Photonik

Q 44: Quantum Optics of Solid State Photon Sources

Q 44.1: Vortrag

Donnerstag, 17. März 2011, 10:30–11:00, HSZ 02

Solid state single photon sources based on color centers in diamond — •Elke Neu¹, David Steinmetz¹, Christian Hepp¹, Janine Riedrich-Möller¹, Roland Albrecht¹, Jan Meijer², Martin Fischer³, Stefan Gsell³, Matthias Schreck³, and Christoph Becher¹ — ¹Universität des Saarlandes, FR 7.2 Experimentalphysik, D-66123 Saarbrücken — ²RUBION, Ruhr-Universität Bochum, D-44780 Bochum — ³Universität Augsburg, Lehrstuhl für Experimentalphysik 4, D-86135 Augsburg

Color centers in diamond are promising candidates for practical single photon sources due to room temperature operation and superior photostability. We observe single photon emission from various color centers, produced either by ion-implantation or in-situ doping during CVD-growth. Optimum results are obtained from Silicon-Vacancy (SiV)-centers in isolated nano-diamonds grown on Iridium layers. These centers feature emission predominantly (80-90 %) into the narrow (0.7 nm) zero-phonon-line and high brightness with up to 4.8 Mcps at saturation, thus being the brightest single color centers to date [1]. We observe for the first time the fine structure of a single SiV-center at cryogenic temperatures and perfom detailed spectroscopy investigating level structures, polarization and the influence of spectral diffusion. We discuss strategies for enhancing spectral and spatial emission properties by coupling color centers to micro-cavities e.g. fiber-based or photonic crystal cavities.
E. Neu et al, ArXiv 1008.4736 accepted for publication in New J. Phys.