Sukhorukov, Andrey; Dmitriev, Sergey V; Suchkov, Sergey V; Kivshar, Yuri
We demonstrate that light propagation in waveguide arrays that include PT -symmetric structures can exhibit strongly nonlocal sensitivity to topology of the array at fixed other parameters. We consider an array composed of lossless waveguides, that includes a pair of PT -symmetric waveguides with balanced gain and loss, and reveal that PT -symmetry breaking thresholds are different for planar and circular array configurations. These results demonstrate that PT -symmetric structures can offer...[Show more]
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