Mechanically controlled quantum memory efficiency and optical transistor

We report the quantum memory efficiency and optical transistor action in a two-sided hybrid optomechanical cavity with a medium composed of three-level atoms inside it. We show that the hybrid system has higher controllable memory efficiency to store and retrieve information as a function of optomechanical coupling parameter. We control the efficiency of this system for different values of optomechanical parameters. Moreover, this system acts as an optical transistor that works on the principle of optomechanically induced transparency (OMIT). We achieve the control over transmission profile, simultaneously turning on and off the different coupling parameters involved in this system. We also present the contrast for transmission of light when control field turns on and off as an evidence of optical transistor action. The numerical results obtained are in complete agreement with analytical results based on presently available technology.