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Nonlocality in PT-symmetric waveguide arrays with gain and loss. | LitMetric

Nonlocality in PT-symmetric waveguide arrays with gain and loss.

Opt Lett

Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia.

Published: June 2012

AI Article Synopsis

  • The study shows that light in waveguide arrays with PT-symmetric structures can be very sensitive to changes in the array's layout.
  • The research focuses on an array with lossless waveguides, featuring PT-symmetric waveguides that have equal amounts of gain and loss.
  • Findings indicate that the breaking points of PT-symmetry differ between planar and circular arrangements, suggesting PT-symmetric structures could enhance optical beam shaping possibilities beyond traditional designs.

Article 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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Source
http://dx.doi.org/10.1364/OL.37.002148DOI Listing

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