Square vortex solitons with a large angular momentum

Details Square vortex solitons with a large angular momentum Square vortex solitons with a large angular momentum

2004-07-14

arxiv.org/abs/nlin/0407034v1

Nonlinear Sciences

Pattern Formation and Solitons

6 pages, 6 figures, submitted to Phys. Rev. E

Scientific paper

10.1103/PhysRevE.70.066605

We show the existence of square shaped optical vortices with a large value of the angular momentum hosted in finite size laser beams which propagate in nonlinear media with a cubic-quintic nonlinearity. The light profiles take the form of rings with sharp boundaries and variable sizes depending on the power carried. Our stability analysis shows that these light distributions remain stable when propagate, probably for unlimited values of the angular momentum, provided the hosting beam is wide enough. This happens if the peak amplitude approaches a critical value which only depends on the nonlinear refractive index of the material. A variational approach allows us to calculate the main parameters involved. Our results add extra support to the concept of surface tension of light beams that can be considered as a trace of the existence of a liquid of light.

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