SAMOP 2021 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 17: Quantum Effects
Q 17.9: Poster
Donnerstag, 23. September 2021, 16:30–18:30, P
Fully fiber coupled devices for efficient cryogenic spectroscopy of single and small ensembles of rare earth ions — Jannis Hessenauer1, •Evgenij Vasilenko1, Xiaoyu Cheng1,2, Tobias Krom1,3, Christina Ioannou1, Christopher Hins1, Senthil Kuppusamy1, Mario Ruben1, Philippe Goldner4, and David Hunger1 — 1Karlsruher Institut für Technologie, Karlsruhe, Germany — 2Universität Stuttgart, Stuttgart,Germany — 3Universität Heidelberg, Heidelberg,Germany — 4Institut de Recherche de Chimie Paris IRCP, Paris, France
Rare earth ions in solid state hosts are a prime candidate for optically addressable spin qubits, owing to their excellent optical and spin coherence times. In order to achieve an efficient spin-photon interface, we try to couple single ions to a fiber-based Fabry-Pérot cavity. However, operation of these cavities at cryogenic temperatures has proven difficult, due to high demands on the mechanical stability. To tackle these challenges, we report on the development of two different, monolithic cavity assemblies, both sacrificing some lateral scanning ability in order to significantly increase the passive stability.
Characterizing the optical and spin properties of rare earth doped materials requires spectroscopic measurements of ensembles, such as spectral hole burning and photon echo spectroscopy. We report on the development of a miniaturized, fiber-coupled scheme to perform these experiments, requiring only microscopic amounts of sample and comparatively low laser power in order to see well resolved spectral hole signatures.