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Proceedings Paper

Coupling of a guided mode with a microresonator: effect of the size of the resonator
Author(s): Kenjiro Miyano; Hiroshi Ishikawa
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Paper Abstract

Optical coupling between a spherical microresonator and a plane dielectric substrate is investigated for small spheres whose diameter is only a few ten times as large as the optical wavelength. The coupling is monitored in real space by observing the interference pattern of the propagating wave in the substrate and the scattered wave from the sphere in the coupling region. A series of numerical model calculations successfully reproduced the interference pattern, by which significant insight into the coupling phenomena has been gained. Especially, it is found that the smallness of the resonator size relaxes the phase matching requirement considerably while maintaining the overall coupling strength. Therefore, its utility is much enhanced in the application as a part of an optical waveguide. The different roles played by the frequency (temporal matching) and the propagation constant (spatial matching) in the resonant coupling is clarified.

Paper Details

Date Published: 24 April 2001
PDF: 8 pages
Proc. SPIE 4270, Laser Resonators IV, (24 April 2001); doi: 10.1117/12.424666
Show Author Affiliations
Kenjiro Miyano, Univ. of Tokyo and Japan Science and Technology Corp. (Japan)
Hiroshi Ishikawa, Univ. of Tokyo and Japan Science and Technology Corp. (Japan)


Published in SPIE Proceedings Vol. 4270:
Laser Resonators IV
Alexis V. Kudryashov; Alan H. Paxton, Editor(s)

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