Topological edge states in equidistant arrays of Lithium Niobate nano-waveguides
arXiv:2303.00809 · doi:10.1364/OL.485415
Abstract
We report that equidistant 1D arrays of thin-film Lithium Niobate nano-waveguides generically support topological edge states. Unlike conventional coupled-waveguide topological systems, the topological properties of these arrays are dictated by the interplay between intra- and inter-modal couplings of two families of guided modes with different parities. Exploiting two modes within the same waveguide to design a topological invariant allows us to decrease the system size by a factor of two and substantially simplify the structure. We present two example geometries where topological edge states of different types (based on either quasi-TE or quasi-TM modes) can be observed within a wide range of wavelengths and array spacings.
References in corpus (7)
- Topological Photonics
- Scheme to Achieve Silicon Topological Photonics
- Integrated photonics on thin-film lithium niobate
- A brief review of topological photonics in one, two, and three dimensions
- Topological states in arrays of optical waveguides engineered via mode interference
- Topological and flat bands states induced by hybridized interactions in one-dimensional photonic lattices
- Topological edge solitons in \{chi}(2) waveguide arrays