High-Q Supercavity States in High-Index Subwavelength All-Dielectric Resonators

K. L. Koshelev, A. A. Bogdanov, S. A. Gladyshev, Z. F. Sadrieva, P. V. Kapitanova, M. V. Rybin, K. B. Samusev, M. F. Limoriov, Yu S. Kivshar

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    We study strong coupling between eigenmodes of a single subwavelength high-index dielectric resonator and analyse the mode transformation and Fano resonances by varying resonators aspect ratio. We demonstrate that the strong mode coupling is associated with formation of states with giant Q-factors similar to the physics of bound states in the continuum when the radiative losses are almost suppressed due to the Friedrich- Wintgen scenario of destructive interference. We confirm our theoretical findings with microwave experiments by using a high-index cylindrical resonator with tunable aspect ratio.

    Original languageEnglish
    Title of host publication2018 Progress In Electromagnetics Research Symposium, PIERS-Toyama 2018 - Proceedings
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages2027-2031
    Number of pages5
    ISBN (Electronic)9784885523151
    DOIs
    Publication statusPublished - 31 Dec 2018
    Event2018 Progress In Electromagnetics Research Symposium, PIERS-Toyama 2018 - Toyama, Japan
    Duration: 1 Aug 20184 Aug 2018

    Publication series

    NameProgress in Electromagnetics Research Symposium
    Volume2018-August
    ISSN (Print)1559-9450
    ISSN (Electronic)1931-7360

    Conference

    Conference2018 Progress In Electromagnetics Research Symposium, PIERS-Toyama 2018
    Country/TerritoryJapan
    CityToyama
    Period1/08/184/08/18

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