https://doi.org/10.1140/epjd/s10053-023-00700-x
Regular Article – Optical Phenomena and Photonics
Study of optical bistability in a double-cavity hybrid optomechanical system consisting of an optical cavity coupled with a mechanical resonator filled with semiconductor quantum dot molecules
Department of Physics, Razi University, Kermanshah, Iran
b ndaneshfar@gmail.com, ndaneshfar@razi.ac.ir
Received:
18
March
2023
Accepted:
8
June
2023
Published online:
23
June
2023
In the present paper, we study the optical bistability in a hybrid optomechanical system made of two coupled cavities, which consists of an optical cavity and a mechanical oscillator containing semiconductor quantum dot molecules. By solving the Heisenberg–Langevin equations of motion for the system in the steady state limit, we obtain an expression for the cavity photon number, which indicates the existence of optical bistability phenomenon in the proposed double-cavity optomechanical system. The impact of effectual physical parameters of the system on the bistable behavior is studied and discussed. It is shown that the threshold and the hysteresis loop of the optical bistability curves can be controlled and modulated by varying the relevant key parameters such as the frequency detuning, the coupling strength of cavities, the optical decay rate, and the tunneling strength in the quantum dot molecules. As a consequence, however, by proper adjustment of the coupling strength of the two cavities and the detuning, the domain of the bistable region changed which can be utilized for designing and optimizing sensitive all-optical switching and optical sensors.
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