Numerical study of light propagation via whispering gallery modes in microcylinder coupled resonator optical waveguides

By using a discontinuous spectral element method, we analyze evanescent wave coupling of whispering gallery modes (WGMs) in microcylinder coupled resonator optical waveguides (CROWs). We demonstrate successful light propagation by WGMs through a chain of coupled cylinder resonators, and that the spe...

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Bibliographic Details
Published inOptics express Vol. 12; no. 26; pp. 6468 - 6480
Main Authors Deng, Shaozhong, Cai, Wei, Astratov, Vasily
Format Journal Article
LanguageEnglish
Published United States 27.12.2004
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Summary:By using a discontinuous spectral element method, we analyze evanescent wave coupling of whispering gallery modes (WGMs) in microcylinder coupled resonator optical waveguides (CROWs). We demonstrate successful light propagation by WGMs through a chain of coupled cylinder resonators, and that the speed of such propagation is strongly dependent on the inter-resonator gap sizes. Our simulations also show that light propagates slower byWGMs with bigger azimuthal numbers than by those with smaller azimuthal numbers. On the other hand, the light propagation by WGMs of the same azimuthal number appears to have the same speed in CROWs regardless of the size and the material of the resonators, indicating that the tail (the part of a WGM outside the resonator) determines inter-resonator coupling strength.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OPEX.12.006468