Publication detail
Photonic waveguides with bound states in the continuum
PETRÁČEK, J. ČTYROKÝ, J. KUZMIAK, V. RICHTER, I.
English title
Photonic waveguides with bound states in the continuum
Type
conference paper
Language
en
Original abstract
Recent research on bound states in the continuum (BICs) in photonic waveguides relied mainly on structures that exhibit the effect of lateral leakage. However, the propagating BICs that are supported in such systems have some limitations: they are localized in or in the vicinity of high-refractive-index materials, they are observed as quasi-TM polarized waves, and they appear only for certain "magic" sets of parameters. Here, we demonstrate two simple waveguide systems that enable alternative mechanisms of BIC formation. In contrast to the previously described configurations, the first geometry, consisting of a rectangular waveguide coupled to a planar waveguide, facilitates genuine guiding of quasi-TE modes in the core with the lower refractive index. The second system, proton exchanged waveguide in Z-cut thin-film lithium niobate, can support very low-loss TM-polarized quasi-BIC modes for a range of waveguide widths not limited to "magic widths".
English abstract
Recent research on bound states in the continuum (BICs) in photonic waveguides relied mainly on structures that exhibit the effect of lateral leakage. However, the propagating BICs that are supported in such systems have some limitations: they are localized in or in the vicinity of high-refractive-index materials, they are observed as quasi-TM polarized waves, and they appear only for certain "magic" sets of parameters. Here, we demonstrate two simple waveguide systems that enable alternative mechanisms of BIC formation. In contrast to the previously described configurations, the first geometry, consisting of a rectangular waveguide coupled to a planar waveguide, facilitates genuine guiding of quasi-TE modes in the core with the lower refractive index. The second system, proton exchanged waveguide in Z-cut thin-film lithium niobate, can support very low-loss TM-polarized quasi-BIC modes for a range of waveguide widths not limited to "magic widths".
Keywords in English
bound states in the continuum; integrated photonics; guided modes; leaky modes; anisotropic waveguides; electro-optic modulators
Released
15.07.2024
Publisher
IEEE
Location
NEW YORK
ISBN
979-8-3503-7732-3
ISSN
2161-2064
Book
24th International Conference on Transparent Optical Networks (ICTON)
Pages from–to
1–4
Pages count
4
BIBTEX
@inproceedings{BUT197209,
author="Jiří {Petráček} and Jiří {Čtyroký} and Vladimír {Kuzmiak} and Ivan {Richter},
title="Photonic waveguides with bound states in the continuum",
booktitle="24th International Conference on Transparent Optical Networks (ICTON)",
year="2024",
month="July",
pages="1--4",
publisher="IEEE",
address="NEW YORK",
isbn="979-8-3503-7732-3",
issn="2161-2064"
}