Berlin 2014 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 61: Photonics II

Q 61.1: Talk

Friday, March 21, 2014, 14:00–14:15, UDL HS3038

Twisted waveguides and three-dimensional chiral photonic lattices — •Alessandro Zannotti, Falko Diebel, Patrick Rose, Martin Boguslawski, and Cornelia Denz — Institut für Angewandte Physik und Center for Nonlinear Science (CeNoS), Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany

The ability to control nonlinear light propagation in a large variety of photonic lattices allows for the discovery of new interesting propagation effects in structured media. To realize reversible two-dimensional refractive index patterns by optical induction, complex nondiffracting beams, such as Bessel, Mathieu, Weber, and discrete beams, can be used as writing beams. Here, these beams are well suited since they show a transversely modulated intensity while being invariant in the direction of propagation.

Breaking this longitudinal symmetry by introducing additional interfering plane waves extends this concept and provides new fascinating lattice structures modulated in all three spatial dimensions. In this contribution, we present the realization of three-dimensionally modulated photonic lattices benefiting from the large structural diversity that nondiffracting beams already offer in two dimensions. Chiral lattices, for instance, based on vortex-bearing nondiffracting beams offer an intriguing combination of transverse periodicity and longitudinal twist. In particular, the extension of Mathieu beams to three dimensions allows the creation of twisted waveguide arrays, which are of special interest for the investigation of soliton and vortex soliton dynamics.