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Proceedings Paper

High-Q resonances with low azimuthal indices in all-dielectric high-index nanoparticles
Author(s): Kirill L. Koshelev; Andrey A. Bogdanov; Zarina F. Sadrieva; Kirill B. Samusev; Mikhail V. Rybin; Mikhail F. Limonov; Yuri S. Kivshar
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Paper Abstract

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 resonators with permittivity ε = 40, we demonstrate that the quality factor of a trapped mode with a low azimuthal index could reach the value Q = 104 .

Paper Details

Date Published: 24 August 2017
PDF: 5 pages
Proc. SPIE 10343, Metamaterials, Metadevices, and Metasystems 2017, 103430F (24 August 2017); doi: 10.1117/12.2272375
Show Author Affiliations
Kirill L. Koshelev, ITMO Univ. (Russian Federation)
The Academic Univ. (Russian Federation)
Andrey A. Bogdanov, ITMO Univ. (Russian Federation)
Ioffe Institute (Russian Federation)
Zarina F. Sadrieva, ITMO Univ. (Russian Federation)
Kirill B. Samusev, ITMO Univ. (Russian Federation)
Ioffe Institute (Russian Federation)
Mikhail V. Rybin, ITMO Univ. (Russian Federation)
Ioffe Institute (Russian Federation)
Mikhail F. Limonov, ITMO Univ. (Russian Federation)
Ioffe Institute (Russian Federation)
Yuri S. Kivshar, ITMO Univ. (Russian Federation)
Australian National Univ. (Australia)

Published in SPIE Proceedings Vol. 10343:
Metamaterials, Metadevices, and Metasystems 2017
Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

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