Symmetry breaking and manipulation of nonlinear optical modes in an asymmetric double-channel waveguide

Details Symmetry breaking and manipulation of nonlinear optical modes in an asymmetric double-channel waveguide Symmetry breaking and manipulation of nonlinear optical modes in an asymmetric double-channel waveguide

2011-09-29

arxiv.org/abs/1109.6525v1

This paper has been published in Physical Review A 84, 033850 (2011)

Physics

Optics

10 pages

Scientific paper

10.1103/PhysRevA.84.033850

We study light-beam propagation in a nonlinear coupler with an asymmetric double-channel waveguide and derive various analytical forms of optical modes. The results show that the symmetry-preserving modes in a symmetric double-channel waveguide are deformed due to the asymmetry of the two-channel waveguide, yet such a coupler supports the symmetry-breaking modes. The dispersion relations reveal that the system with self-focusing nonlinear response supports the degenerate modes, while for self-defocusingmedium the degenerate modes do not exist. Furthermore, nonlinear manipulation is investigated by launching optical modes supported in double-channel waveguide into a nonlinear uniform medium.

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