Topic
Atomic coherence
About: Atomic coherence is a research topic. Over the lifetime, 877 publications have been published within this topic receiving 29395 citations.
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TL;DR: In this paper, the transient properties of light amplification in a coherently coupled three-level ε-Lambda-type system were analyzed and the system evolution from the transient regime into the steady state was studied.
Abstract: We analyze transient properties of light amplification in a coherently coupled three-level \ensuremath{\Lambda}-type system and study the system evolution from the transient regime into the steady state. From the time evolution of the atomic coherence and population distribution, we discuss the transient light amplification mechanism with and without population inversion. We also solve the density-matrix equations in the steady state and derive the conditions for the existence of specific light amplification mechanisms, such as light amplification without inversion in any standard state basis, light amplification by stimulated Raman scattering, and light amplification from population inversion in the dressed states.
67 citations
01 Jan 1976
66 citations
TL;DR: In this article, nonlinear optical phenomena from collective motion of ultracold atoms within a strong-coupling cavity are reported. The nonlinearity arises from probe-induced atom displacement.
Abstract: We report on nonlinear optical phenomena from collective motion of ultracold atoms within a strong-coupling cavity. The nonlinearity arises from probe-induced atom displacement. Longevity of motional coherence allows nonlinearity at extremely low cavity photon numbers.
65 citations
TL;DR: All-optical flip-flop and storage of optical pulse signals with a low peak power of several tens of microwatts are implemented and the refractive and absorptive chi3 nonlinearities enhanced by atomic coherence provide the physical mechanism of the phenomena.
Abstract: The dependence of the shift of an optical bistability hysteresis curve on the nonlinear phase shift induced by a controlling light is observed in a four-level atomic system of 87 Rb inside an optical ring cavity. In the process the intensity of the coupling beam keeps constant and the atomic system is operated at near conditions of coherent population trapping due to atomic coherence. The refractive and absorptive chi3 nonlinearities enhanced by atomic coherence provide the physical mechanism of the phenomena. Based on the effects, all-optical flip-flop and storage of optical pulse signals with a low peak power of several tens of microwatts are implemented.
62 citations
TL;DR: In this article, the steady-state optical bistability behavior in a three-level A-type atomic system closed by a microwave field under the condition that the applied fields are in resonance with corresponding atomic transitions was investigated.
61 citations