Coupling of a guided mode with a microresonator: effect of the size of the resonator

Kenjiro Miyano; Hiroshi Ishikawa

doi:10.1117/12.424666

24 April 2001 Coupling of a guided mode with a microresonator: effect of the size of the resonator

Kenjiro Miyano, Hiroshi Ishikawa

Proceedings Volume 4270, Laser Resonators IV; (2001) https://doi.org/10.1117/12.424666
Event: Photonics West 2001 - LASE, 2001, San Jose, CA, United States

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.

Citation Download Citation

Kenjiro Miyano and Hiroshi Ishikawa "Coupling of a guided mode with a microresonator: effect of the size of the resonator", Proc. SPIE 4270, Laser Resonators IV, (24 April 2001); https://doi.org/10.1117/12.424666

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