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Nonlinear coupled waveguides exhibit symmetry breaking when a monochromatic wave is injected. In specific nonlinear plaquette systems, this leads to the emission of nonsymmetric satellite waves, resulting in nonmonochromatic behavior.

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Area of Science:

  • Nonlinear optics
  • Waveguide physics
  • Solid-state physics

Background:

  • Coupled nonlinear waveguides are crucial for optical signal processing.
  • Understanding symmetry breaking is key to controlling light propagation.
  • Cubic nonlinearity can induce complex wave dynamics.

Purpose of the Study:

  • Investigate symmetry breaking in coupled nonlinear waveguide systems.
  • Analyze the behavior of monochromatic waves in nonlinear plaquettes.
  • Characterize the emission of waves under specific nonlinear conditions.

Main Methods:

  • Numerical simulations of wave propagation in coupled nonlinear waveguides.
  • Analysis of stationary solutions in a nonlinear plaquette system.
  • Examination of parameter space for stable and unstable solutions.

Main Results:

  • Symmetry breaking observed, leading to antisymmetric wave emission.
  • Existence of a parameter domain with no stable stationary solutions in nonlinear plaquettes.
  • Monochromatic wave injection results in nonsymmetric satellite wave emission with altered energies.

Conclusions:

  • Nonlinear coupled waveguides can exhibit complex symmetry-breaking dynamics.
  • Nonlinear plaquettes display unique parameter regimes leading to nonmonochromatic responses.
  • Control over wave emission and energy transfer is possible through nonlinearity.