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Engineered nonlinear lattices.

C B Clausen1, P L Christiansen, L Torner

  • 1Department of Mathematical Modelling, Technical University of Denmark, DK-2800 Lyngby, Denmark.

Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
|April 24, 2002
PubMed
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Researchers demonstrate nonlinear optical stripes that guide light, enabling exploration of discrete light dynamics. This work introduces a controllable experimental platform for studying nonlinear wave phenomena like breathers.

Area of Science:

  • Nonlinear optics
  • Waveguide fabrication
  • Discrete physics

Background:

  • Waveguide structures are crucial for controlling light propagation.
  • Exploring discrete nonlinear phenomena requires specialized experimental setups.

Purpose of the Study:

  • To demonstrate the fabrication of nonlinear optical stripes capable of trapping and guiding light.
  • To investigate the beam dynamics in arrays of these nonlinear stripes.
  • To provide an experimental platform for studying discrete nonlinear effects.

Main Methods:

  • Utilized the quasi-phase-matching technique to fabricate nonlinear optical stripes.
  • Investigated arrays of these stripes with varying stripe widths.
  • Analyzed beam propagation dynamics using theoretical models and experimental observations.

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Main Results:

  • Successfully fabricated nonlinear stripes that function as optical waveguides.
  • Observed that narrow stripes lead to beam dynamics governed by a quadratic nonlinear discrete equation.
  • Demonstrated the propagation and trapping of breathers by discreteness in narrow stripe arrays.
  • Identified a 'quasilattice' structure for wide stripes, bridging lattice and continuous systems.

Conclusions:

  • Nonlinear optical stripes offer a novel method for light confinement and guidance.
  • The fabricated structures provide a controllable experimental system for exploring discrete nonlinear physics.
  • The study reveals unique beam propagation behaviors, including breather dynamics and quasilattice formation.