Nonlocality in PT-symmetric waveguide arrays with gain and loss.
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.
Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia. ans124@physics.anu.edu.au
Andrey A
AA
Sukhorukov
Sergey V
SV
Dmitriev
Sergey V
SV
Suchkov
Yuri S
YS
Kivshar