https://doi.org/10.1140/epjp/s13360-024-05618-w
Review
Influence of non-trapezoidal cross section on polarization characteristics and leakage loss of LNOI ridge waveguide
College of Sciences, Zhejiang University of Technology, 310023, Hangzhou, China
Received:
20
June
2024
Accepted:
2
September
2024
Published online:
10
September
2024
In order to research the influence of waveguide cross-sectional shape on LNOI ridge waveguide, a non-trapezoidal shallow-etched ridge waveguide with an arc-shaped angle at the top of the ridge region was proposed. The polarization characteristics and leakage loss of the waveguide under different cross-sectional parameters as well as the relationship between leakage loss and transmittivity under different angles of sidewall were analyzed using vector finite element method. It is found that the smaller the leakage loss, the greater the transmittivity. Additionally, increasing the radius of arc-shaped angle and the angle of sidewall significantly enhances the polarization properties and reduces leakage loss and appropriate arc-shaped angle can facilitate mode conversion, thereby optimizing waveguide performance. Therefore, the results are expected to provide valuable references for further optimizing the design and fabrication of LNOI ridge waveguide.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
