This study provides a comprehensive modal analysis of thin-film lithium niobate (TFLN) channel waveguides with rib and strip geometries, considering various crystal cuts (X-cut and Z-cut) and on-chip orientations. The finite-element solver in JCMsuite was used to rigorously compute the guided modes, taking full account of the material anisotropy and complex permittivity tensors. The software enabled extensive parameter scans to reveal modal effective indices, symmetry classes, polarization properties, and hybridization effects critical for integrated photonic device design.
M. Hammer, et al. TFLN channel waveguides of rib and strip type: properties of guided modes. Opt. Continuum 4, 2356 (2025).