Spiral laser beams in inhomogeneous media

Opt Lett. 2013 Aug 1;38(15):2763-6. doi: 10.1364/OL.38.002763.


Explicit solutions of the inhomogeneous paraxial wave equation in a linear and quadratic approximation are applied to wave fields with invariant features, such as oscillating laser beams in a parabolic waveguide and spiral light beams in varying media. A similar effect of superfocusing of particle beams in a thin monocrystal film, harmonic oscillations of cold trapped atoms, and motion in magnetic field are also mentioned.