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High-Q resonances with low azimuthal indices in all-dielectric high-index nanoparticles

Koshelev, Kirill L.; Bogdanov, A. A.; Sadrieva, Zarina F.; Samusev, Kirill; Rybin, Mikhail V.; Limonov, Mikhail F.; Kivshar, Yuri


Recently, a novel class of high-Q optical resonators based on all-dielectric subwavelength nanoparticles with high refractive index has been proposed [M. V. Rybin, et al, arXiv:1706.02099, 2017]. Here we study a complex spectrum of such nanoscale resonators by means of the resonant-state expansion, treating the problem as a nonHermitian eigenproblem. We show that the high-Q features can be described within the mechanism of external coupling of open channels via the continuum. For ceramic...[Show more]

CollectionsANU Research Publications
Date published: 2017-08-24
Type: Conference paper
Source: Proceedings of SPIE - The International Society for Optical Engineering
DOI: 10.1117/12.2272375
Access Rights: Open Access


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