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Characterizing whispering-gallery modes in microspheres by direct observation of the optical standing-wave pattern in the near field

Abstract : We demonstrated the use of a near-field probe to map the evanescent field of an optical standing wave in a fused-silica whispering-gallery mode microresonator. The periodicity of the observed standing wave allows us to estimate accurately the radial mode number of the whispering-gallery mode resonance that is being excited. We find that the use of a fiber half-coupler to excite these resonances in fused-silica microspheres results in only the lowest radial mode numbers’ being strongly excited, as predicted.
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https://hal-iogs.archives-ouvertes.fr/hal-01575814
Contributor : Nicolas Dubreuil <>
Submitted on : Monday, August 21, 2017 - 5:15:22 PM
Last modification on : Tuesday, October 6, 2020 - 4:26:41 PM

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J. Knight, N. Dubreuil, V. Sandoghdar, J. Hare, V. Lefèvre-Seguin, et al.. Characterizing whispering-gallery modes in microspheres by direct observation of the optical standing-wave pattern in the near field. Optics Letters, Optical Society of America - OSA Publishing, 1996, 21 (10), pp.698-700. ⟨10.1364/OL.21.000698⟩. ⟨hal-01575814⟩

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