One-photon detuning tolerance for large Kerr nonlinearity and photon switching via electromagnetically induced transparency
Xiangming Hu · Journal of Central China Normal University · 2004
In a three-level Λ system, as long as the exact two-photon resonance is satisfied and no matter what one-photon detuning is, electromagnetically induced transparency can be achieved. In this paper we show that we must take into account one-photon detuning tolerance when the systems based on perturbed EIT produce new nonlinear optical effects. In detail, one-photon detuning for large Kerr nonlinearity and photon switching via electromagnetically induced transparency should be far less than the product of the ratio of the intensity of the coupling field to the intensity of the signal field and the detuning or the decay rate of the additional transition.