@inproceedings{b4967b5d17344c5fb6ebfacc08375b6c,
title = "High-Q resonances with low azimuthal indices in all-dielectric high-index nanoparticles",
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 = 40, we demonstrate that the quality factor of a trapped mode with a low azimuthal index could reach the value Q = 104.",
keywords = "All-dielectric, Fano resonance, high-Q resonator, non-Hermitian., subwavelength",
author = "Koshelev, {Kirill L.} and Bogdanov, {Andrey A.} and Sadrieva, {Zarina F.} and Samusev, {Kirill B.} and Rybin, {Mikhail V.} and Limonov, {Mikhail F.} and Kivshar, {Yuri S.}",
note = "Publisher Copyright: {\textcopyright} 2017 SPIE.; Metamaterials, Metadevices, and Metasystems 2017 ; Conference date: 06-08-2017 Through 10-08-2017",
year = "2017",
doi = "10.1117/12.2272375",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Zheludev, {Nikolay I.} and Noginov, {Mikhail A.} and Nader Engheta and Zheludev, {Nikolay I.}",
booktitle = "Metamaterials, Metadevices, and Metasystems 2017",
address = "United States",
}