Freiburg 2019 – wissenschaftliches Programm

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FM: Fall Meeting

FM 57: Quantum Sensing: Spectroscopy I

FM 57.5: Talk

Mittwoch, 25. September 2019, 15:15–15:30, 2006

Rare-earth electron spin spectroscopy on single Ce³⁺:YSO — •Thomas Kornher¹, Roman Kolesov¹, Kangwei Xia², Dawu Xiao³, Fiametta Sardi¹, Nan Zhao³, and Jörg Wrachtrup¹ — ¹3. Physikalisches Institut, Universität Stuttgart, Stuttgart, Germany — ²Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong, China — ³Beijing Computational Science Research Center, Haidan District, Beijing, China

Experimental results on optically resolved single Ce³⁺ ions in yttrium orthosilicate (YSO) are presented. The electron spin associated with Ce³⁺ is initialized, and read-out optically at 4 K temperature. Coherent manipulation allows for probing the local environment of the electron spin and shows the influence of the yttrium bath onto the electron spin. Additionally, frozen core effects, predicted by ab initio calculations, can be observed. Spin-lattice relaxation time of T₁>2.6 ms was measured and spin coherence time T₂ is suggested to be T₁-limited by ab initio calculations. Furthermore, sensing of nearby ²⁹Si nuclear spins is investigated, since Ce³⁺ electron spin can potentially be exploited as interface between photons and proximal, long-lived nuclear spins, such as yttrium and ²⁹Si.