Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 22: Posters: Quantum Optics and Photonics II
Q 22.21: Poster
Tuesday, March 10, 2020, 16:30–18:30, Empore Lichthof
Towards Cavity-Enhanced Spectroscopy of Single Europium Ions in Yttria Nanocrystals — Timon Eichhorn1, Kelvin Chung1, Sören Bieling1, •Tobias Krom1, Bernardo Casabone2,3, Julia Benedikter1,3,4, Thomas Hümmer3,4, Alban Ferrier5,6, Philippe Goldner5,6, Hugues De Riedmatten2,7, and David Hunger1 — 1Karlsruher Institut für Technologie — 2ICFO-Institut de Ciencies Fotoniques — 3Max-Planck-Institut für Quantenoptik — 4Fakultät für Physik, Ludwig-Maximilians-Universität — 5Université PSL, Chimie ParisTech, CNRS — 6Sorbonne Université — 7ICREA-Institució Catalana de Recerca i Estudis Avançats
A promising approach for realizing scalable quantum registers lies in the efficient optical addressing of qubits in a solid state host. Within the EU Quantum Flagship project SQUARE we tackle this problem by coupling the fluorescence of Eu3+ ions doped into Y2O3 nanoparticles (NPs) to a high-finesse fiber-based Fabry-Pérot microcavity. As a first step towards efficient readout of single rare earth ions, we present cavity-enhanced spectroscopy measurements of a few europium-ions as published in New J. Phys. 20 (2018) 095006. We furthermore report our efforts towards Purcell-enhanced single ion detection with high-resolution excitation spectroscopy. Therefore, we are currently setting up a reference cavity to narrow down the laser linewidth. Simultaneously we are working on a new method to place single NPs inside a passively stable, low-temperature fiber-fiber microcavity.