Nematic liquid crystal waveguide arrays

K. A. Brzda̧kiewicz*, M. A. Karpierz, A. Fratalocchi, G. Assanto, E. Nowinowski-Kruszelnicki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

We investigate linear and nonlinear light propagation in a voltage-tunable array of waveguide channels in undoped nematic liquid crystals. This novel geometry, based on a photonic structure with a periodic modulation of refractive index controlled by an electric field, offers a wealth of possibilities for the study of discrete optical phenomena. The structure, in conjunction with a giant, non-resonant and voltage-dependent reorientational nonlinearity, allows us to drive the system from bulk diffraction to discrete propagation. Theoretical and experimental investigations, carried out with near infrared light wavelength and powers of a few milliWatts, show the possibility of transverse light localization, resulting in discrete spatial solitons. Such array, with its voltage- and light-adjustable guided-wave confinement and coupling, exhibits potentials for the realization of multifunctional routers and all-optical signal processors with nematic liquid crystals.

Original languageEnglish (US)
Pages (from-to)107-112
Number of pages6
JournalOpto-electronics Review
Volume13
Issue number2
StatePublished - 2005
Externally publishedYes

Keywords

  • Discrete diffraction
  • Nonlinear optics
  • Optical nonlinearity in liquid crystals
  • Self-action effects
  • Solitons

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

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