Freiburg 2019 – wissenschaftliches Programm
Sitzungen | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
FM: Fall Meeting
FM 85: Poster: Enabling Technologies: Cavity QED
FM 85.1: Poster
Donnerstag, 26. September 2019, 16:30–18:30, Tents
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 Oliviera 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
A promising approach for realizing scalable quantum registers lies in the efficient optical addressing of solid state quantum memories. Within the EU Quantum Flagship project SQUARE we tackle this problem by coupling the flourescence of Eu ions in 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. 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 100 kHz. We determined the number of ions in a NP and observed an increased fluorescence count rate in agreement with the Purcell enhancement of the cavity. An inhomogeneous linewidth of 22 GHz, which is close to bulk value, indicates high crystal quality of the NPs.