Optical control of topological end states via soliton formation in a 1D lattice
arxiv(2024)
摘要
Solitons are self-consistent solutions of the nonlinear Schrödinger
equation that maintain their shape during propagation. Here we show, using a
pump-probe technique, that soliton formation can be used to optically induce
and control a linear topological end state in the bulk of a
Su-Schrieffer-Heeger lattice, using evanescently-coupled waveguide arrays.
Specifically, we observe an abrupt nonlinearly-induced transition above a
certain power threshold due to an inversion symmetry-breaking nonlinear
bifurcation. Our results demonstrate all-optical active control of topological
states.
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