2000 character limit reached
Generation of optical vorticity from topological defects (1608.03555v1)
Published 11 Aug 2016 in cond-mat.soft and cond-mat.other
Abstract: The propagation of an electromagnetic wave in a medium with a screw dislocation is studied. Adopting the formalism of differential forms, it is shown that torsion is responsible for quantized modes. Moreover, it is demonstrated that the modes thus obtained have well defined orbital angular momentum, opening the possibility to design liquid-crystal-based optical tweezers.