Abstract
When multiple laser beams interact with multi-level atomic systems, interesting spatial effects for the probe beam, such as the pattern formation, spatial displacement, and spatial soliton, can occur, controlled by stronger coupling or pumping laser beams. In this chapter, spatial dispersion properties of the probe and generated four-waving mixing (FWM) beams are presented, which can lead to spatial shift and splitting of these weak laser beams. Such beam displacement and splitting can be controlled by the story coupling/pumping laser beams via enhanced cross-Kerr nonlinearity in the multi-level atomic systems near electromagnetically induced transparency (EIT) resonance. Such enhanced spatial dispersion behaviors follow closely to the traditional linear and nonlinear dispersion properties in a frequency domain for multi-level EIT systems. By controlling the spatial displacements of the weak probe and FWM beams with coupling/pumping beams, spatial optical switching and routing of one beam or multiple optical beams can be achieved. Such controllable spatial beam displacement and splitting effects are illustrated in two- and three-level atomic system.
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© 2011 Higher Education Press, Beijing and Springer-Verlag Berlin Heidelberg
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Zhang, Y., Nie, Z., Xiao, M. (2011). Controlling Spatial Shift and Spltting of Four-Wave Mixing. In: Coherent Control of Four-Wave Mixing. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-19115-2_7
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DOI: https://doi.org/10.1007/978-3-642-19115-2_7
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-19114-5
Online ISBN: 978-3-642-19115-2
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