Giant Kerr nonlinearity in a four-level atomic medium |
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| Authors: | Hamid Reza Hamedi Seyyed Hossein Asadpour Mostafa Sahrai |
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| Institution: | 1. Young Researchers Club, Bandar Anzali Branch, Islamic Azad University, Bandar Anzali, Iran;2. Research Institute for Applied Physics and Astronomy, University of Tabriz, Tabriz, Iran |
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| Abstract: | The linear and nonlinear response of a driven four-level Λ-type atomic system with two fold lower-levels with three driving fields is investigated. It is found that the giant Kerr nonlinearity can be achieved just by tuning the intensity of coupling fields. Maximal Kerr nonlinearity with zero linear and nonlinear absorption enters the EIT window. Also it is found that the relative phase between applied fields can change the Kerr nonlinearity behavior. |
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