Microwave and optical photons entanglement in a hybrid electro-optomechanical system: effect of a mechanical plasmonic waveguide at high temperatures

Abstract

In this paper, we describe a hybrid electro-optomechanical system consisting of a microwave resonator and an optical cavity which are coupled together by a plasmonic waveguide with a fixed side and another mechanically oscillating one. We show that a considerable entanglement can be obtained between optical and microwave photons at temperatures between $$T=10K$$ and $$T=15K$$ through our proposed system. Also, we show that it is possible to suppress effect of the temperature on entanglement between optical and microwave photons by a direct current voltage applied on both sides of the plasmonic waveguide. Furthermore, we show importance of the presence of optomechanical interaction in the system to obtain a significant entanglement between optical and microwave photons. Overall we show our system is an appropriate candidate to perform as a detector in detection of received microwave signals from an object with low reflectivity which is embedded in a bright thermal environment.