Efficient coupling of Er-doped silicon-rich oxide to microdisk whispering gallery modes

Verbert, J.; Mazen, F.; Charvolin, T.; Picard, E.; Calvo, V.; Noé, P.; Gérard, J.-M.; Hadji, E.
March 2005
Applied Physics Letters;3/14/2005, Vol. 86 Issue 11, p111117
Academic Journal
We report room-temperature light emission from erbium-doped silicon-rich oxide integrated in a silica microdisk. Silica disks are fabricated by standard optical lithography and etching techniques. Erbium-doped silicon-rich oxide is then deposited by coevaporation of silicon and erbium under oxygen flux. A spatially resolved photoluminescence experiment highlights the efficient coupling of the signal to whispering gallery modes when the excitation beam is focused near the edge of the disk. Quality factors as high as 3000 are measured, limited by the setup’s spectral resolution.


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