@article{Beer2023,
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.},
archivePrefix = {arXiv},
arxivId = {2303.00809},
author = {Gorbach, Andrey V. and Beer, Jesper and Souslov, Anton},
doi = {10.1364/OL.485415},
eprint = {2303.00809},
file = {:C\:/Users/ag263/OneDrive - University of Bath/Mendeley Library/2023/Gorbach, Beer, Souslov - Optics Letters - 2023.pdf:pdf;:C\:/Users/ag263/OneDrive - University of Bath/Mendeley Library/2023/Gorbach, Beer, Souslov - Optics Letters - 2023(2).pdf:pdf},
issn = {1539-4794},
journal = {Optics Letters},
keywords = {Array waveguide devices,Arrays,Lithium niobate,Waveguide design,Waveguide modes,Waveguides},
month = {apr},
number = {8},
pages = {1982--1985},
publisher = {Optica Publishing Group},
title = {{Topological edge states in equidistant arrays of lithium niobate nano-waveguides}},
url = {https://opg.optica.org/viewmedia.cfm?uri=ol-48-8-1982&seq=0&html=true https://opg.optica.org/abstract.cfm?uri=ol-48-8-1982 https://opg.optica.org/ol/abstract.cfm?uri=ol-48-8-1982},
volume = {48},
year = {2023}
}