EIT enhanced self-Kerr nonlinearity in the three-level lambda system under Doppler broadening
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https://doi.org/10.15625/0868-3166/24/3/3915Keywords:
Kerr nonlinearity, atomic coherence, electromagnetically induced transparencyAbstract
Using density-matrix theory, an analytical expression of the self-Kerr nonlinear coefficient of a three-level lambda EIT medium for a weak probe light is derived. Influences of the coupling light and Doppler broadening on the self-Kerr coefficient are investigated and compared to experimental observation with a good agreement. The self-Kerr nonlinearity is basically modified and greatly enhanced in the spectral region corresponding to EIT transparent window. Furthermore, sign, slope, and magnitude of the self-Kerr coefficient can be controlled with frequency and intensity of the coupling light and temperature. Such controllable Kerr nonlinearity can find interesting applications in optoelectronic devices working with low-light intensity.Downloads
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Published 30-08-2014
