Publication detail

Photonic waveguides with bound states in the continuum

PETRÁČEK, J. ČTYROKÝ, J. KUZMIAK, V. RICHTER, I.

Original Title

Photonic waveguides with bound states in the continuum

Type

conference paper

Language

English

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".

Keywords

bound states in the continuum; integrated photonics; guided modes; leaky modes; anisotropic waveguides; electro-optic modulators

Authors

PETRÁČEK, J.; ČTYROKÝ, J.; KUZMIAK, V.; RICHTER, I.

Released

15. 7. 2024

Publisher

IEEE

Location

NEW YORK

ISBN

979-8-3503-7732-3

Book

24th International Conference on Transparent Optical Networks (ICTON)

ISBN

2161-2064

Periodical

IEEE Conference proceedings

State

United States of America

Pages from

1

Pages to

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",
  journal="IEEE Conference proceedings",
  pages="1--4",
  publisher="IEEE",
  address="NEW YORK",
  doi="10.1109/ICTON62926.2024.10647505",
  isbn="979-8-3503-7732-3",
  issn="2161-2064"
}