Erlangen 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 40: Poster: Quantum Optics and Photonics III
Q 40.18: Poster
Dienstag, 6. März 2018, 16:15–18:15, Zelt West
Towards cavity-enhanced detection of single rare earth ions — •Julia Benedikter1,2, Bernardo Casabone3, Thomas Hümmer1, Alban Ferrier4, Philippe Goldner4, Theodor W. Hänsch1,5, and David Hunger2 — 1Ludwig-Maximilians-Universität München, Germany — 2Karlsruher-Institut für Technologie, Germany — 3Institut de Ciències Fotòniques, Barcelona, Spain — 4Chimie ParisTech, ENS, Paris, France — 5Max-Planck-Institut für Quantenoptik, Garching, Germany
Rare earth ions doped into solids provide outstanding optical and spin coherence properties, which renders them as promising candidates for optically adressable quantum memories and multi-qubit registers. 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 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 coupled to a cavity in a cryogenic environment.