High-resolution spectroscopy of whispering gallery modes in large dielectric spheres.
The mode spectrum of a 3.8-cm-diameter fused-silica sphere has been studied in the vicinity of 1.06 microm. A single-frequency Nd:YAG laser was used to excite whispering gallery modes by means of evanescent wave coupling. The spectrum is in excellent agreement with predictions from Mie theory.
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Byer