Title :
Composite multi-vortex diffraction-free beams and van Hove singularities in honeycomb lattices
Author :
Paltoglou, Vassilis ; Zhigang Chen ; Efremidis, Nikolaos K.
Author_Institution :
Dept. of Math. & Appl. Math., Univ. of Crete, Heraklion, Greece
Abstract :
We find that honeycomb lattices support diffraction-free multi-vortices above the van-Hove singularity. Exact solutions for the spinor components are obtained in the Dirac limit. Right at the singularity the solutions become infinite extend stripes.
Keywords :
optical lattices; optical vortices; Dirac limit; composite multivortex diffraction-free beams; honeycomb lattices; spinor components; van-Hove singularity; Graphene; Lattices; Optical diffraction; Optical propagation; Periodic structures; Scattering;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2015 Conference on
Conference_Location :
San Jose, CA
