Abstract
We embed a helical lattice into a portion of a bulk photorefractive medium to form a synthetic structure and numerically investigate the nonlinear transmission of a probe vortex beam in the structure. Numerical demonstrations confirm that the structure can stabilize multisoliton states in the form of nonrotating and nonexpanding necklacelike solitons. Lattice structure and the amplitude, width, and topological charge of the probe vortex beam can influence the structure of necklacelike solitons. Interestingly, an increase in beam intensity may lead to multiplication of the number of bright “spots.”
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