Helmholtz dark solitons: oblique propagation, saturable materials & bistability
Lundie, MJ, McDonald, GS and Christian, JM 2012, Helmholtz dark solitons: oblique propagation, saturable materials & bistability , in: College of Science and Technology Research Showcase Day, 20th June 2012, University of Salford, Greater Manchester, UK.
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Dark spatial optical solitons comprise a uniform background wave that is modulated by an obliquely-propagating 'dip' in the light intensity profile. Appearing throughout nonlinear science, these universal entities possess a phase topology that endows them with a remarkable degree of stability against perturbations to their shape. Hence, the photonics community is greatly interested in dark solitons for potential use as 'information bits' in future optical technologies. Our Group has been developing Helmholtz soliton theory for the past 14 years. This more sophisticated modelling approach completely eliminates the intrinsic angular limitations of classic paraxial models, where waves must travel along (or at near-negligibly-small angles with respect to) the laboratory longitudinal direction. The most recent system we have analyzed captures the generic effects of a saturable defocusing nonlinearity, where the locally-induced refractive-index change becomes bleached under high-intensity illumination. Families of exact bistable dark solitons have been derived by deploying a unique blend of mathematical methods, and linearization techniques have predicted the inherent stability of the background plane wave against small-amplitude modulations. Our new solutions have a raft of crucial asymptotic properties, complementing their bright  and paraxial  counterparts.
|Item Type:||Conference or Workshop Item (Poster)|
|Themes:||Media, Digital Technology and the Creative Economy|
Subjects outside of the University Themes
|Schools:||Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering > Materials & Physics Research Centre|
|Publisher:||University of Salford|
|Depositing User:||JM Christian|
|Date Deposited:||17 Jul 2012 13:35|
|Last Modified:||17 Jul 2012 13:35|
|References:|| J. M. Christian, G. S. McDonald, and P. Chamorro-Posada, J. Opt. Soc. Am. B 26, 2323 (2009).  W. Krolikowski and B. Luther-Davies, Opt. Lett. 18, 188 (1993).|
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