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Physical Review A

Effect of quantum interference on optical bistability in the three-level V-type atomic system

Amitabh Joshi, Wenge Yang, Min Xiao

Published Jul 25, 2003• 182 citations
Publisher

Abstract

The phenomenon of optical bistability is studied for the three-level atomic system in V-configuration confined in a unidirectional optical ring cavity, and the effects of quantum interference and coupling field are investigated. The possibility of obtaining optical multistability in the system by controlling quantum interference and coupling field strength is also discussed.

DOI
10.1103/physreva.68.015806

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The phenomenon of optical bistability is studied for the three-level atomic system in V-configuration confined in a unidirectional optical ring cavity, and the effects of quantum interference and coupling field are investigated. The possibility of obtaining optical multistability in the system by controlling quantum interference and coupling field strength is also discussed.
This paper studies the optical bistability in a degenerate three-level Λ-type atomic system in a unidirectional optical ring cavity. The effect of quantum interference on the phase control of the optical bistabilty is then discussed. It is shown that the optical bistability changes with the intensity of coupling and the rate of an incoherent pumping field. The possibility of creating an optical multistability (OM) by the intensity of coupling field relative phase between the applied fields, and the rate of an incoherent pump field has also been discussed.
Optical bistability (OB) and optical multi-stability (OM) of a four-level Λ-type atomic system with two fold lower levels inside a unidirectional ring cavity is investigated. The effect of quantum interference arising from spontaneous emission and incoherent pumping on OB and OM is discussed. It is found that the threshold of OB and OM can be controlled by quantum interference mechanisms. In addition intensity of coupling field and the rate of an incoherent pumping field on behavior of OB and OM are then discussed.
We theoretically investigate optical bistability (OB) behaviour in a four-level atomic system confined in a unidirectional ring cavity. It is shown that OB can be controlled by adjusting the intensity of the coupling field and the value of the cooperativity parameter. More importantly, our numerical results show that the threshold intensity of OB can be reduced without decreasing the range of the hysteresis loop via adjusting the effect of spontaneously generated coherence (SGC) or the relative phase between two applied fields. The influence of the frequency detuning of the coupling field on the OB behaviour is also discussed.
Under nonresonant condition,we theoretically investigate the optical bistability(OB) and multistability(OM) behaviors in a three-level ∧-type system using a microwave field driving a hyperfine transition between two lower states inside the unidirectional ring cavity.The results show that the optical bistability behavior can be controlled by adjusting the intensity and the frequency detuning of the coupling field,respectively.It is also found that the microwave field plays an important role in achieving the multistability.The influence of the atomic cooperation parameter on the OM behavior is discussed at last.
We theoretically analyze the behavior of single optical bistability (OB), double OB, and tristability (OT) in a three-level V-type atomic system confined in a unidirectional optical ring cavity. The physics behind the emergence of various bistable and tristable states, and switching from the absorptive to the dispersive characteristics, are explored. The role of probe- and control-field detunings on the input-output characteristics is probed. Further, it is found that the switching between various bistable phenomena is defined by the ratio between the absolute peak values of the parameters describing dispersion and absorption, respectively. This ratio sets a criterion for obtaining absorptive OB, OT, double OB, and dispersive OB. The role of control-field intensity and detuning as well as the cooperation parameter on the input-output characteristics are explored. Finally, a scheme is discussed to control the width of the middle branch of double OB and OT as well as single OB.
The optical bistable behavior of V-type three-level atomic system in a unidirectional ring cavity driven by a coherent field is studied.A single mode laser field is applied to two transitions simultaneously.The interference between decay channels is very important.Studies show that atomic coherent effects could significantly decrease the optical bistability threshold.We also analyze the effect of the atomic cooperation parameter,the width between two upper levels,and the detuning on the optical bistability.