Rostock 2019 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 41: Poster: Quantum Optics and Photonics II

Q 41.39: Poster

Mittwoch, 13. März 2019, 16:15–18:15, S Fobau Physik

Spectroscopy of the tin-vacancy centre in diamond — •Dennis Herrmann¹, Johannes Görlitz¹, Morgane Gandil¹, Philipp Fuchs¹, Takayuki Iwasaki², Takashi Taniguchi³, Mutsuko Hatano², and Christoph Becher¹ — ¹Fachrichtung 7.2, (Experimentalphysik), Universität des Saarlandes, Campus E2.6, 66123 Saarbrücken — ²Department of Electrical and Electronic Engineering, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan — ³Advanced Materials Laboratory, National Institute for Material Science, 1-1 Namiki, Tsukuba, 305-0044, Japan

Colour centres in diamond are promising candidates for quantum information processing applications. The nitrogen-vacancy centre exhibits milliseconds coherence times for the electron spin at room temperature while the silicon-vacancy (SiV) centre excels with negligible spectral diffusion and emission of the majority of photons into its zero phonon line. A potential candidate combining long coherence times with outstanding optical properties is the tin-vacancy (SnV) centre. The fine structure ground state splitting is about a factor 20 larger than for the SiV thereby potentially suppressing phonon mediated decoherence processes already at liquid helium temperatures. We here present spectroscopy on SnV centres determining the lifetime and polarization as well as the temperature dependence of linewidth and line shifts. Furthermore, a precise determination of Debye-Waller factor and single photon emission properties are presented, enabling further investigations of spin coherence times assessing the suitability of the SnV centre as spin qubit.