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arXiv · 1209.3395

Dynamical tunneling-assisted coupling of high-Q deformed microcavities using a free-space beam

Qi-Fan Yang·Xue-Feng Jiang·Ya-Long Cui·Linbo Shao·Yun-Feng Xiao
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Abstract

We investigate the efficient free-space excitation of high-Q resonance modes in deformed microcavities via dynamical tunneling-assisted coupling. A quantum scattering theory is employed to study the free-space transmission properties, and it is found that the transmission includes the contribution from (1) the off-resonance background and (2) the on-resonance modulation, corresponding to the absence and presence of high-Q modes, respectively. The theory predicts asymmetric Fano-like resonances around high-Q modes in background transmission spectra, which are in good agreement with our recent experimental results. Dynamical tunneling across Kolmogorov-Arnold-Moser tori is further studied, which plays an essential role in the Fano-like resonance. This efficient free-space coupling holds potential advantages in simplifying experimental condition and exciting high-Q modes in higher-index-material microcavities.

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Qi-Fan Yang, Xue-Feng Jiang, Ya-Long Cui, Linbo Shao, Yun-Feng Xiao. 2013-04-15. Dynamical tunneling-assisted coupling of high-Q deformed microcavities using a free-space beam. https://doi.org/10.1103/physreva.88.023810

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