The Effect of Increasing the Frequency of One of Four Laser Beams Interacting with Five-Level Atom
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Nonlinear response of optical materials to applied light field, is one of main topics in nonlinear optics because it is essential for the realization of most nonlinear optical processes.In this work we studied the nonlinear response of two types of Five-Level atom to applied four Laser fields.Particularly, we studied the effect of changing the value of Rabi frequency of one laser beams when it interacting with the Five-Levels atom at stander values of the others. In N-tripod type, an unexpected behavior for both the real and imaginary parts of the electric susceptibility have been noticed. Moreover, for M-type, we noticed that with increasing the value of the strong laser field related to transition |2⟩ ↔ |3⟩, gives rise to both values of real and imaginary parts of the electric susceptibility.