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Japanese Journal of Applied Physics

Group Velocity of Transmitted Light and Reflected Light from a Dispersive Dielectric Layer

Mostafa Sahrai, Mehdi Sharifi

Published Mar 1, 2009• 0 citations
Publisher

Abstract

The reflected light and transmitted light from a slab doped with a three-level Λ-type atoms are theoretically investigated. The effect of the relative phase between coupling and probe fields on the group velocity of the transmitted light and reflected light has been discussed. We show that in the presence of a spontaneously generated coherence (SGC), the group velocity of the transmitted light and reflected light becomes phase dependent.

DOI
10.1143/jjap.48.030210

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The reflected light and transmitted light from a slab doped with a three-level Λ-type atoms are theoretically investigated. The effect of the relative phase between coupling and probe fields on the group velocity of the transmitted light and reflected light has been discussed. We show that in the presence of a spontaneously generated coherence (SGC), the group velocity of the transmitted light and reflected light becomes phase dependent.
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Abstract We investigate the linear and nonlinear dispersion and absorption properties of a weak probe field in a dielectric slab doped with Λ -type atoms. The effect of a relative phase between applied fields on linear and nonlinear dispersion, absorption and Kerr nonlinearity is discussed. It is demonstrated that the system is phase sensitive when spontaneously generated coherence and an incoherent pump exist simultaneously. The effect of the coupling field intensity on the Kerr nonlinearity is also presented.
This paper studies the effects of the incoherent pumping field and the spontaneously generated coherence (SGC) on the phase control of group velocity. The effects of a relative phase between probe and coupling fields on the absorption and the dispersion are then discussed. It is shown that the phase dependence of the group velocity not only depends on the existence of the SGC, but also depends on the existence of the incoherent pump field. We show that for the weak probe field, and in the presence of SGC, the existence of the incoherent pump field is a necessary condition for the phase control of the dispersion, the absorption and the group index.
We investigate the linear and nonlinear dispersion and absorption properties of a weak probe field in a slab doped with V-type atoms. The effect of relative phase between applied fields on linear and nonlinear dispersion and absorption is discussed. It is demonstrated that the system is phase-sensitive when spontaneously generated coherence (SGC) exists. The effects of coupling field intensity, incoherent pump, and phase difference between probe and coupling fields on Kerr nonlinearity are also presented.