Optical bound state in the continuum in the one-dimensional photonic structures: Transition into a resonant state

Z. F. Sadrieva, I. S. Sinev, A. K. Samusev, I. V. Iorsh, A. A. Bogdanov, K. L. Koshelev, Osamu Takayama, Radu Malureanu, A. V. Lavrinenko

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


    Optical bound states in the continuum (BIC) are localized states with energy lying above the light line and having infinite lifetime. Any losses taking place in real systems result in transformation of the bound states into resonant states with finite lifetime. In this work, we analyze properties of BIC in CMOS-compatible one-dimensional photonic structure based on silicon-on-insulator wafer at telecommunication wavelengths, where the absorption of silicon is negligible. We reveal that a high-index substrate could destroy both off-Γ BIC and in-plane symmetry protected at-Γ BIC turning them into resonant states due to leakage into the diffraction channels opening in the substrate. We show how two concurrent loss mechanisms — scattering due to surface roughness and leakage into substrate — contribute to the suppression of the resonance lifetime and specify the condition when one of the mechanisms becomes dominant. The obtained results provide useful guidelines for practical implementations of structures supporting optical bound states in the continuum.
    Original languageEnglish
    Title of host publicationProgress In Electromagnetics Research Symposium - Spring
    VolumePart F134321
    Publication date2017
    ISBN (Print)9781509062690
    Publication statusPublished - 2017
    Event38th Progress in Electromagnetic Research Symposium 2017 - Park Inn by Radisson Pribaltiyskaya hotel, St. Petersburg, Russian Federation
    Duration: 22 May 201725 May 2017
    Conference number: 38


    Conference38th Progress in Electromagnetic Research Symposium 2017
    LocationPark Inn by Radisson Pribaltiyskaya hotel
    Country/TerritoryRussian Federation
    CitySt. Petersburg
    Internet address
    SeriesProgress in Electromagnetics Research Symposium


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