Journal article Open Access

Cavity-enhanced spectroscopy of a few-ion ensemble in Eu3+:Y2O3

Casabone, B.; Benedikter, J.; Hümmer, T.; Oehl, F.; de Oliveira Lima, K.; W Hänsch, T.; Ferrier, A.; Goldner, P.; de Riedmatten, H.; Hunger, D.

We report on the coupling of the emission from a single europium-doped nanocrystal to a fiber-based microcavity under cryogenic conditions. As a first step, we study the properties of nanocrystals that are relevant for cavity experiments and show that embedding them in a dielectric thin film can significantly reduce scattering loss and increase the light–matter coupling strength for dopant ions. The latter is supported by the observation of a fluorescence lifetime reduction, which is explained by an increased local field strength. We then couple an isolated nanocrystal to an optical microcavity, determine its size and ion number, and perform cavity-enhanced spectroscopy by resonantly coupling a cavity mode to a selected transition. We measure the inhomogeneous linewidth of the coherent transition and find a value that agrees with the linewidth in bulk crystals, evidencing a high crystal quality. We detect the fluorescence from an ensemble of few ions in the regime of power broadening and observe an increased fluorescence rate consistent with Purcell enhancement. 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.

Files (25.9 MB)
Name Size
Casabone_2018_New_J._Phys._20_095006.pdf
md5:71e9a3030d7a5b30f58f4890b704408f
936.4 kB Download
Casabone_zenodo.1546139_Figure1_v1.txt
md5:e150da46427963ceed05ae990f088de8
803 Bytes Download
Casabone_zenodo.1546139_Figure2_v1.txt
md5:f20ec5e5cff514d9fad32a8fe897ad62
489 Bytes Download
Casabone_zenodo.1546139_Figure3_v1.txt
md5:cbf0bd57a1866d52581d863c56c5c082
992 Bytes Download
Figures.zip
md5:636f6ecc6f3a124ef8f0612d9b9ea662
25.0 MB Download
108
123
views
downloads
All versions This version
Views 108108
Downloads 123123
Data volume 279.3 MB279.3 MB
Unique views 8484
Unique downloads 8686

Share

Cite as