Thin-film-lithium-niobate (TFLN) is a highly relevant material in integrated photonics due to its high efficiency and bandwidth. It offers enormous potential in the miniaturisation of components, making it essential for future quantum technologies.
To gain a deeper understanding of the optical properties of thin-film-lithium-niobate, Manfred Hammer et al. have analysed the propagation of light in dielectric slab waveguides made of TFLN, operated in the linear regime.
The researchers from the Theoretical Electrical Engineering group demonstrate an analytical method for rigorous modal analysis of three-layer waveguides with a birefringent, anisotropic core. This provides reliable solutions for the modes of TFLN slab waveguides. The results shown here form the basis for the numerical analysis of more complex LNOI waveguide channels that are relevant in applications.
The publication was published in this year's November issue of Optics Continuum and was highlighted as an ‘Editor's pick’. The authors have not only described the methods very detailed but have also created an online solver to make the findings of this research work freely available. Latter can therefore be directly transferred to other projects or used for teaching purposes.
The paper is freely accessible via https://opg.optica.org/optcon/fulltext.cfm?uri=optcon-3-11-2024&id=562067.
