Spatial optical solitons in nonlinear photonic crystals

Details Spatial optical solitons in nonlinear photonic crystals Spatial optical solitons in nonlinear photonic crystals

2001-08-06

arxiv.org/abs/nlin/0108006v1

Phys. Rev. E 65, 036609(1-14) (2002)

Nonlinear Sciences

Pattern Formation and Solitons

15 pages, 21 figures

Scientific paper

10.1103/PhysRevE.65.036609

We study spatial optical solitons in a one-dimensional nonlinear photonic crystal created by an array of thin-film nonlinear waveguides, the so-called Dirac-comb nonlinear lattice. We analyze modulational instability of the extended Bloch-wave modes and also investigate the existence and stability of bright, dark, and ``twisted'' spatially localized modes in such periodic structures. Additionally, we discuss both similarities and differences of our general results with the simplified models of nonlinear periodic media described by the discrete nonlinear Schrodinger equation, derived in the tight-binding approximation, and the coupled-mode theory, valid for shallow periodic modulations of the optical refractive index.

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