Analysis of multipolar contributions to eigenmodes in resonators of various shapes

Sergey Gladyshev; Kristina Frizyuk; Andrey Bogdanov

doi:10.1117/12.2555709

1 April 2020 Analysis of multipolar contributions to eigenmodes in resonators of various shapes

Sergey Gladyshev, Kristina Frizyuk, Andrey Bogdanov

Proceedings Volume 11345, Nanophotonics VIII; 113451L (2020) https://doi.org/10.1117/12.2555709
Event: SPIE Photonics Europe, 2020, Online Only

Abstract

The most common way to enhance interaction of electromagnetic waves with matter at the nanoscale is to use microresonators and resonant optical nanoantennas. In virtue of small size their optical properties are well described in terms of multipole decomposition, namely, by first several terms in the multipole expansion. The specific multipole content of the mode is completely determined by its symmetry and shape of the resonator. Here, we classify eigenmodes in resonators of the simplest shapes depending on their symmetry group. For each type of mode, we found its multipole content. As an illustrative example, we apply the developed formalism to the analysis of dielectric triangular prism and demonstrate the formation of high-Q resonances originated due to suppression of the scattering through the main multipole channel.

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Citation Download Citation

Sergey Gladyshev, Kristina Frizyuk, and Andrey Bogdanov "Analysis of multipolar contributions to eigenmodes in resonators of various shapes", Proc. SPIE 11345, Nanophotonics VIII, 113451L (1 April 2020); https://doi.org/10.1117/12.2555709

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