Josephson oscillations of edge solitons in a photonic-topological coupler

Abstract

We introduce a scheme of a photonic coupler built of two parallel topological-insulator slab waveguides with the intrinsic Kerr nonlinearity, separated by a gap. Josephson oscillations (JO) of a single edge soliton created in one slab, and of a pair of solitons created in two slabs, are considered. The single soliton jumping between the slabs is subject to quick radiative decay. On the other hand, the JO of the copropagating soliton pair may be essentially more robust, as one soliton can absorb dispersive waves emitted by the other. The most robust JO regime is featured by the pair of solitons with phase shift $\pi$ between them.

arXiv comment5 pages, 5 figures, to be published in Optics Letters

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Cited by in corpus (2)

• Observation of nonlinearity-controlled switching of topological edge states
• Macroscopic Zeno effect in Su-Schrieffer-Heeger photonic topological insulator