Multipole analysis of bound states in the continuum supported by a periodic array of spheres
Date
2019
Authors
Sadrieva, Zarina F
Frizyuk, Kristina
Petrov, Mihail I
Kivshar, Yuri
Bogdanov, A. A.
Journal Title
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Volume Title
Publisher
IEEE
Abstract
In this work we propose an alternative explanation of the both symmetry-protected and accidental BIC's origin in terms of multipole moments and a group-theoretical approach. We develop an analytical method determining the contribution of vector spherical harmonics to the far field, which helps to find symmetry allowed and forbidden spherical harmonics describing bound states in the continuum. We explore a multipole expansion of eigenmodes and explain
formation mechanism of bound states in the continuum in periodic dielectric nanospheres.
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Source
Proceedings of the 13th International Congress on Artificial Materials for Novel Wave Phenomena
Type
Conference paper
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2099-12-31