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We theoretically investigate a Thouless pumping scheme in the 1D topologicalSu-Schrieffer-Heeger (SSH) model for single and multiple band-gaps systems whenimplemented in a discrete nematic liquid crystal arrangement. For anelectrically controlled SSH waveguide array, we numerically demonstrateedge-to-edge light transport at low power levels. On the other hand, at higherpowers, the transport is frustrated by light-induced nonlinear defect states,giving rise to robust all-optical switching.

Optical Thouless pumping transport and nonlinear switching in a topological low-dimensional discrete nematic liquid crystal array