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The European Physical Journal Plus

Tunable slow and fast light in an atom-assisted hybrid system via external mechanical driving force

Akhtar Munir, Muqaddar Abbas, Gao Xianlong, Ziauddin Ziauddin

Published Jul 1, 2022• 3 citations
Publisher
DOI
10.1140/epjp/s13360-022-02990-3

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We study theoretically the features of the output field of a quadratically coupled optomechanical system assisted with three-level atoms. In this system, the atoms interact with the cavity field and are driven by a classical field, and the cavity is driven by a strong coupling field and a weak signal field. We find that there exists a multi-window transparency phenomenon. The width of the transparent windows can be adjusted by controlling the system parameters, including the number of the atoms, the powers of the lasers driving the atoms and driving the cavity, and the environment temperature. We also find that a tunable switch from fast light to slow light can be realized in this system.
We explain the probe field transmission spectrum under the influence of a strong pump field in a hybrid optomechanical system, composed of an optical cavity, a mechanical resonator, and a two-level atom. We show fast (superluminal) and slow (subluminal) light effects of the transmitted probe field in the hybrid system for suitable parametric regimes. For the experimental accessible domain, we find that the fast light effect obtained for the single optomechanical coupling can further be enhanced with the additional atom-field coupling in the hybrid system. Furthermore, we report the existence of a tunable switch from fast to slow light by adjusting the atomic detuning with the anti-Stokes and Stokes sidebands, respectively, as ${\mathrm{\ensuremath{\Delta}}}_{a}=+{\ensuremath{\omega}}_{m}$ and $\ensuremath{-}{\ensuremath{\omega}}_{m}$. The reported characteristics are realizable in state-of-the-art laboratory experiments.