Excitation mapping of whispering gallery modes in silica microcavities

Abstract

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

References in corpus (2)

• Tunable whispering gallery modes for spectroscopy and CQED experiments
• Frequency tuning of the whispering gallery modes of silica microspheres for CQED and spectroscopy

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