Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 41: Poster: Quantum Optics and Photonics II
Q 41.36: Poster
Mittwoch, 13. März 2019, 16:15–18:15, S Fobau Physik
Cavity-enhanced spectroscopy of a few-ion ensemble in Eu3+:Y2O3 — Bernardo Casabone1,2, Julia Benedikter2,3,4, Thomas Hümmer2,3, Franziska Oehl3, Karmel de Oliveira Lima5, Theodor W. Hänsch2,3, Alban Ferrier5,6, Philippe Goldner5,6, Hughes de Riedmatten1,7, •Timon Eichhorn4, Kelvin Chung4, and David Hunger4 — 1ICFO-Institut de Ciencies Fotoniques — 2Max-Planck-Institut für Quantenoptik — 3Fakultät für Physik, Ludwig-Maximilians-Universität — 4Karlsruher Institut für Technologie — 5Université PSL, Chimie ParisTech, CNRS — 6Sorbonne Université — 7ICREA-Institució Catalana de Recerca i Estudis Avançats
We present cavity-enhanced spectroscopy measurements of a few ions in europium-doped yttria (Eu3+:Y2O3) nanoparticles (NPs) as recently published in New J. Phys. 20 (2018) 095006. In particular, we focus on the coherent transition 5D0 - 7F0 of Eu3+ that has been shown to have narrow optical linewidth in the order of kHz. This transition was coupled to a high-finesse fiber-based Fabry-Pérot microcavity to allow for the determination of number of ions, and observation of increased fluorescence count rate, which is agreeable with Purcell enhancement. The inhomogenous linewidth of the 5D0 - 7F0 transition was found to be 22 GHz, which is close to bulk value, indicative of high crystal quality of the NPs. The results represent an important step towards the efficient readout of single rare earth ions with excellent optical and spin coherence properties, which is promising for applications in quantum communication and distributed quantum computation.