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Journal of the Optical Society of America B

Tunable all-optical Kerr switch based on a cavity optomechanical system with a Bose–Einstein condensate

Bin Chen, Cheng Jiang, Ka‐Di Zhu

Published Jul 21, 2011• 17 citations
Publisher

Abstract

We theoretically propose a scheme of an all-optical Kerr switch in a cavity optomechanical system with a Bose–Einstein condensate. It is shown that the nonlinear Kerr response can be easily switched on or off by modulating the pump beam power. We also demonstrate that such a switch can work well under a low power of the pump beam. The scheme proposed here may have potential applications in quantum electronics and quantum information networks.

DOI
10.1364/josab.28.002007

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We theoretically propose a scheme of an all-optical Kerr switch in a cavity optomechanical system with a Bose–Einstein condensate. It is shown that the nonlinear Kerr response can be easily switched on or off by modulating the pump beam power. We also demonstrate that such a switch can work well under a low power of the pump beam. The scheme proposed here may have potential applications in quantum electronics and quantum information networks.
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We theoretically analyse the optical and optomechanical nonlinearity present in a hybrid system consisting of a quantum dot(QD) coupled to an optomechanical cavity in the presence of a nonlinear Kerr medium, and show that this hybrid system can be used as an all optical switch. A high degree of control and tunability via the QD-cavity coupling strength, the Kerr and the optomechanical nonlinearity over the bistable behaviour shown by the mean intracavity optical field and the power transmission of the weak probe field can be achieved.The results obtained in this investigation has the potential to be used for designing efficient all-optical switch and high sensitive sensors for use in Telecom systems.
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In this study, we theoretically investigate the optical bistability (OB) in hybrid triple-cavity optomechanical systems (OMSs) composed of three coupled cavities (two optical cavities and one optomechanical cavity) in the presence of semiconductor quantum dot molecules and a Kerr medium with a Kerr coefficient of χ when the optomechanical cavity is driven by a pump laser with frequency ωp and the amplitude Ep, which results in optical pressure on the movable mirror of the OMS. The dynamical equations of motion for this triple-cavity hybrid system in the steady state limit are solved using the Heisenberg-Langevin equations to achieve OB. We have demonstrated that it is possible to adjust both the width of the hysteresis loop and the switching threshold by controlling the Kerr coefficient . t is found that by properly tuning the physical parameters, the bistable thresholds of the system can be switched on and switched off, which is useful for designing and optimizing sensitive all-optical switching .