  Entanglement between optical mode and microwave mode is a critical issue in
illumination systems. Traditionally, optomechanical systems are applied to
couple the optical mode to microcavity modes. However, due to some restrictions
of this system such as sensitivity to the thermal noise at room temperature, a
novel optoelectronic system is designed in this study to fix the recent system
problems. Unlike recent optomechanical systems, the optical modes are directly
coupled to the microwave cavity through the optoelectronic elements with no
need mechanical system. The main objective of this work is to generate the
entangled modes at room temperature. For this purpose, we theoretically analyze
the dynamics of motion of the optoelectronic system with the
Heisenberg-Langevin equations, from which one can calculate the coupling
between optical and microcavity modes. The most important feature of this
system is the coupling between optical mode and microwave cavity mode, which is
done using a photodetector and a Varactor diode. Hence, by controlling the
photodetector current (photocurrent), which is dependent on the optical cavity
incidence wave and the Varactor diode biased, which is the function of the
photocurrent, the coupling between the optical and microcavity mode is fully
done. The modeling results show that the coupled modes are entangled at the
room temperature with no need to any mechanical parts.
