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Q: Fachverband Quantenoptik und Photonik

Q 20: Quantum Information (Solid State Systems)

Q 20.4: Talk

Monday, March 11, 2019, 17:15–17:30, S HS 002 Chemie

Investigation of the charge state and spectroscopy of the tin-vacancy centre in diamond — •Johannes Görlitz¹, Dennis Herrmann¹, 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

Recent experiments have proven colour centres in diamond to be highly suitable for application in quantum information processing. Nevertheless there is an ongoing search for a colour centre combining the milliseconds electron spin coherence times of the nitrogen vacancy centre at room temperature with the insensitivity to electrical field noise and the close to unity Debye-Waller factor of the silicon vacancy (SiV) centre. One promising candidate to achieve this aim is the tin vacancy (SnV) centre. Its negative charge state exhibits a similar electronic fine structure as the SiV but exceeds its ground state splitting by a factor of 20 and thereby potentially enables long spin coherence times at liquid helium temperatures. The neutral charge state, however, remains unstudied so far. We here present spectroscopic investigations on the SnV(-) centre such as polarization, lifetime, Debye-Waller factor and temperature dependence of linewidth and lineshifts. Furthermore we provide first spectroscopic studies of the neutral charge state.