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Optical multiband vector breathers in tunable waveguide arrays.

Andrea Fratalocchi1, Gaetano Assanto, Kasia A Brzdakiewicz

  • 1Nonlinear Optics and Optoelectronics Laboratory, Italian Institute for the Physics of Matter, University Roma Tre, Via della Vasca Navale 84, 0Q146 Rome, Italy.

Optics Letters
|January 29, 2005
PubMed
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We observed stable multiband optical breathers in voltage-controlled waveguide arrays within nematic liquid crystals. These phenomena, arising from the combination of modes from two distinct bands, propagate over significant distances.

Area of Science:

  • Nonlinear optics
  • Condensed matter physics
  • Photonics

Background:

  • Coupled waveguide arrays are crucial for optical signal processing.
  • Nematic liquid crystals offer tunable optical properties.
  • Optical solitons and breathers are fundamental nonlinear phenomena.

Purpose of the Study:

  • To investigate the formation and propagation of multiband optical breathers.
  • To explore the tunability of these breathers using an applied voltage.
  • To analyze the underlying physics using Floquet-Bloch theory.

Main Methods:

  • Fabrication of voltage-adjustable coupled waveguide arrays.
  • Experimental observation of light propagation and breather formation.
  • Application of Floquet-Bloch theory for theoretical description.

Related Experiment Videos

Main Results:

  • Multiband optical breathers were successfully generated and observed.
  • Symmetric breathers were formed through vector composition of modes from two bands.
  • Stable propagation of breathers was confirmed over large distances.

Conclusions:

  • Voltage-adjustable waveguide arrays in nematic liquid crystals provide a platform for controlling optical breathers.
  • The observed breathers demonstrate robust propagation characteristics.
  • Floquet-Bloch theory effectively describes the behavior of these multiband optical breathers.