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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.
Reference
A. Mahalov, E. Suazo and S. K. Suslov, Spiral Laser Beams in Inhomogeneous Media
, Optics Letters, Vol. 38, (2013) Issue 15, pp. 2763-2766. |
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