We show that with the quasi-phase-matching technique it is possible to fabricate stripes of nonlinearity that trap and guide light like waveguides. We investigate an array of such stripes and find that when the stripes are sufficiently narrow, the beam dynamics is governed by a quadratic nonlinear discrete equation. The proposed structure therefore provides an experimental setting for exploring discrete effects in a controlled manner. In particular, we show propagation of breathers that are eventually trapped by discreteness. When the stripes are wide the beams evolve in a structure we term a quasilattice, which interpolates between a lattice system and a continuous system. [S1063-651X(99)51311-1].
|Journal||Physical Review E. Statistical, Nonlinear, and Soft Matter Physics|
|Publication status||Published - 1999|
Bibliographical noteCopyright (1999) by the American Physical Society.
- PHASE-MATCHING GRATINGS
- QUADRATIC SOLITONS
- 2ND-HARMONIC GENERATION
- POLED LITHIUM-NIOBATE
- OPTICAL PARAMETRIC OSCILLATOR