Excitation mapping of whispering gallery modes in silica microcavities

Details Excitation mapping of whispering gallery modes in silica microcavities Excitation mapping of whispering gallery modes in silica microcavities

2009-11-07

arxiv.org/abs/0911.1442v1

Optics Letters 35, 4 (2010) 583-585

Physics

Quantum Physics

Scientific paper

10.1364/OL.35.000583

We report the direct observation of the electromagnetic-field distribution of whispering?gallery modes in silica microcavities (spheres and toroids). It is revealed by their excitation efficiency with a tapered fiber coupler swept along the meridian. The originality of this method lies in the use of the coupler itself for the near field mapping, eliminating the need of additional tools used in previous work. This method is successfully applied to microspheres and microtoroids

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