Bound states in the continuum and Fano resonances in the Dirac cone spectrum
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URI (для ссылок/цитирований):
https://www.osapublishing.org/josab/abstract.cfm?uri=josab-36-8-2221https://elib.sfu-kras.ru/handle/2311/128828
Автор:
Evgeny N. Bulgakov
Dmitrii N. Maksimov
Коллективный автор:
Институт инженерной физики и радиоэлектроники
Лаборатория нанотехнологий спектроскопии и квантовой химии
Дата:
2019-08Журнал:
Journal of the Optical Society of America B: Optical PhysicsКвартиль журнала в Scopus:
Q1Квартиль журнала в Web of Science:
Q2Библиографическое описание:
Evgeny N. Bulgakov. Bound states in the continuum and Fano resonances in the Dirac cone spectrum [Текст] / Evgeny N. Bulgakov, Dmitrii N. Maksimov // Journal of the Optical Society of America B: Optical Physics. — 2019. — Т. 36 (№ 8). — С. 2221-2225Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала.
Аннотация:
We consider light scattering by two-dimensional arrays of high-index dielectric spheres arranged into a triangular lattice. It is demonstrated that in the case of a triple degeneracy of resonant leaky modes in the gamma point, the scattering spectra exhibit a complicated picture of Fano resonances with extremely narrow linewidth. The Fano features are explained through coupled-mode theory for a Dirac cone spectrum as a signature of optical bound states in the continuum (BIC). It is found that the standing wave in-gamma BIC induces a ring of off-gamma BICs due to different scaling laws for real and imaginary parts of the resonant eigenfrequencies in the Dirac cone spectrum. A quantitative theory of the spectra is proposed.