Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 24: Quantum Information: Solid State Systems I
Q 24.6: Vortrag
Dienstag, 7. März 2017, 16:00–16:15, P 3
Towards cavity-enhanced single rare earth ion detection — •B. Casabone1,2, J. Benedikter1, T. Hümmer4, A. Ferrier3, P. Goldner3, T. Hänsch1,4, H. de Riedmatten2, and D. Hunger5 — 1Max Planck Institute of Quantum Optics, Garching — 2ICFO, The Institute of Photonic Sciences, Castelldefels — 3Chimie ParisTech, Paris — 4Ludwig-Maximilians-Universität, München — 5Karlsruhe Institute of Technology, Karlsruhe
Rare earth ions doped into solids provide outstanding optical and spin coherence properties, which renders them as promising candidates for quantum optical applications ranging from quantum memories to quantum-nonlinear optics. However, due to the dipole-forbidden nature of the coherent transitions, they couple only weakly to optical fields. This limits most experiments to macroscopic ensembles, where inhomogeneous broadening complicates and limits quantum control.
Here we present an approach to get efficient access to individual ions or small ensembles by coupling them to a high-Finesse optical microcavity. We employ fiber-based Fabry-Perot cavities[1] with high finesse and a free-space mode volume as small as a few λ3 to achieve substantial Purcell enhancement. This offers the potential to boost the spontaneous emission rate by several orders of magnitude (up to 104), thereby making the weak transitions bright.
We report on the current status of our experiment, where we investigate Eu3+:Y2O3 nanocrystals[2] coupled to a cavity in a cryogenic environment.
[1] Hunger, NJP 12, 065038 (2010) [2] Perrot, PRL 111, 203601 (2013)