Spatial solitons at interfaces: nonparaxial refraction & giant Goos-Hänchen shifts
McCoy, EA, Christian, JM and McDonald, GS 2012, Spatial solitons at interfaces: nonparaxial refraction & giant Goos-Hänchen shifts , in: College of Science and Technology Research Showcase Day, 20th June 2012, University of Salford, Greater Manchester, UK.
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The behaviour of light at interfaces underpins, in an essential way, the entire field of optics: almost all technological device designs and architectures rely on the interplay between material mismatches (that define the interface) and the 'degree of obliqueness' of the incident, reflected, and refracted waves. The seminal works on nonlinear beam refraction  considered scalar bright spatial solitons impinging on the interface between two Kerr-type media with different dielectric parameters, but where all angles (relative to the interface) were constrained to be near-negligibly small. Our Group has been developing new mathematical and computational tools to describe arbitrary-angle¬ refraction of similar beams . The most recent research has been considering more general material aspects (e.g., from non-Kerr nonlinearities) and also giant Goos-Hänchen (GH) shifts [2,3]. Close to a critical point (which depends upon a complicated interplay between finite-beam characteristics and material mismatches), the GH shift shows a remarkable sensitivity to incidence angle, and also to medium nonlinearity. Indeed, we believe we have uncovered GH shifts that are unprecedented in magnitude, perhaps the largest ever predicted. A universal Snell’s law describing beam refraction has also been tested directly against full numerical calculations. References:  A. B. Aceves, J. V. Moloney, and A. C. Newell, Phys. Rev. A 39, 1809 (1989); Phys. Rev. A 39 1828 (1989).  J. Sánchez-Curto, P. Chamorro-Posada, and G. S. McDonald, Opt. Lett. 32, 1126 (2007); Opt. Lett. 36, 3605 (2011).  F. Goos and H. Hänchen, Ann. Phys. 1, 333 (1947).
|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 13:37|
|Last Modified:||17 Jul 2012 13:37|
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