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Characterization of Anisotropic Leaky Mode Modulators for Holovideo
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Observation of nonlinear surface waves in modulated waveguide arrays.

Xinyuan Qi1, Ivan L Garanovich, Zhiyong Xu

  • 1Nonlinear Physics Centre and Laser Physics Centre, Research School of Physics and Engineering,Australian National University, Canberra, ACT 0200, Australia. qixycn@gmail.com

Optics Letters
|September 17, 2009
PubMed
Summary

We demonstrate nonlinear surface waves in modulated waveguide arrays with defects. Light intensity changes enable beam switching between waveguides due to nonlinear coupling.

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Area of Science:

  • Nonlinear optics
  • Waveguide optics
  • Materials science

Background:

  • Nonlinear surface waves are crucial for optical devices.
  • Waveguide arrays offer tunable optical properties.
  • Surface defects can localize or guide light.

Purpose of the Study:

  • To theoretically and experimentally investigate nonlinear surface waves.
  • To explore beam switching phenomena in modulated waveguide arrays.
  • To analyze the role of surface defects and self-defocusing nonlinearity.

Main Methods:

  • Theoretical modeling of nonlinear surface waves.
  • Experimental fabrication of LiNbO(3) waveguide arrays with surface defects.
  • Optical characterization of beam propagation and switching behavior.

Main Results:

  • Observed nonlinear surface waves at the edge of modulated waveguide arrays.
  • Demonstrated intensity-dependent beam switching to different output waveguides.
  • Confirmed nonlinear coupling between linear surface modes.

Conclusions:

  • Nonlinear surface waves in defect-engineered waveguide arrays enable optical switching.
  • Self-defocusing nonlinearity plays a key role in the observed phenomena.
  • Fabricated LiNbO(3) structures are suitable for advanced photonic applications.