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Surface gap solitons.

Yaroslav V Kartashov1, Victor A Vysloukh, Lluis Torner

  • 1ICFO-Institut de Ciencies Fotoniques, Universitat Politecnica de Catalunya, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain.

Physical Review Letters
|April 12, 2006
PubMed
Summary
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We discovered new surface gap solitons at the interface of uniform media and optical lattices. These solitons combine surface wave and gap soliton properties, existing above a threshold lattice depth and forming stable states.

Area of Science:

  • Nonlinear optics
  • Condensed matter physics

Background:

  • Surface waves and gap solitons are distinct nonlinear phenomena.
  • Optical lattices create periodic potentials for light propagation.

Purpose of the Study:

  • To investigate the existence and properties of surface gap solitons.
  • To explore the conditions for their formation and stability.

Main Methods:

  • Theoretical analysis of wave propagation at the interface.
  • Numerical simulations of nonlinear optical systems.

Main Results:

  • Existence of surface gap solitons demonstrated at the uniform media-optical lattice interface.
  • Solitons exhibit properties of both surface waves and gap solitons due to Bragg scattering.

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  • A threshold lattice depth is required for their formation.
  • Complete stability and formation of stable bound states are achievable.

    • Conclusions:

    • Surface gap solitons represent a novel class of nonlinear optical waves.
    • Their stability and bound state formation offer potential for optical device applications.