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Bistable Helmholtz bright solitons in saturable materials (2009)
Journal Article
Christian, J., McDonald, G., & Chamorro-Posada, P. (2009). Bistable Helmholtz bright solitons in saturable materials. Journal of the Optical Society of America B, 26(12), 2323-2330. https://doi.org/10.1364/JOSAB.26.002323

We present, to the best of our knowledge, the first exact analytical solitons of a nonlinear Helmholtz equation with a saturable refractive-index model. These new two-dimensional spatial solitons have a bistable characteristic in some parameter regim... Read More about Bistable Helmholtz bright solitons in saturable materials.

Nonlinear interfaces: intrinsically nonparaxial regimes and effects (2009)
Journal Article
Sánchez-Curto, J., Chamorro-Posada, P., & McDonald, G. (2009). Nonlinear interfaces: intrinsically nonparaxial regimes and effects. Journal of Optics A: Pure and Applied Optics, 11(5), 054015. https://doi.org/10.1088/1464-4258/11/5/054015

The behaviour of optical solitons at planar nonlinear boundaries is a problem rich in intrinsically nonparaxial regimes that cannot be fully addressed by theories based on the nonlinear Schrödinger equation. For instance, large propagation angles are... Read More about Nonlinear interfaces: intrinsically nonparaxial regimes and effects.