Anisotropic charge displacement supporting isolated photorefractive optical needles
Eugenio DelRe, Alessandro Ciattoni, Aharon J. Agranat
Abstract
The strong asymmetry in charge distribution supporting a single non-interacting spatial needle soliton in a paraelectric photorefractive is directly observed by means of electroholographic readout. Whereas in trapping conditions a quasi-circular wave is supported, the underlying double-dipolar structure can be made to support two distinct propagation modes.
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