Nonlocality in PT-symmetric waveguide arrays with gain and loss |
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Authors: | Sukhorukov Andrey A Dmitriev Sergey V Suchkov Sergey V Kivshar Yuri S |
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Institution: | Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia. ans124@physics.anu.edu.au |
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Abstract: | 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 new regimes for optical beam shaping compared to conservative structures. |
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