Abstract
Spatial displacements of the probe and generated four-wave mixing beams are observed in a three-level V-type, as well as a two-level atomic system near resonance. The observed spatial shift curves reflect the typical enhanced cross-Kerr nonlinear dispersion properties in the electromagnetically induced transparency (EIT) systems. The spatial beam displacements are controlled by the strong control laser beam and the atomic density. Studying such controlled spatial beam shifts can be important in image storage and in generating spatially correlated (entangled) laser beams in multilevel EIT systems.
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