Engineered nonlinear lattices

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 d...

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Bibliographic Details
Published in:Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics Statistical physics, plasmas, fluids, and related interdisciplinary topics, 1999-11, Vol.60 (5 Pt A), p.R5064-R5067
Main Authors: Clausen, C B, Christiansen, P L, Torner, L, Gaididei, Y B
Format: Article
Language:English
Subjects:
Enginyeria de la telecomunicació
Telecommunication
Telecomunicació
Àrees temàtiques de la UPC
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Summary: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.
ISSN:1063-651X
1095-3787
DOI:10.1103/PhysRevE.60.R5064