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Controllable Optical Bistability and Four-Wave Mixing in a Photonic-Molecule Optomechanics
Hua-Jun Chen1, Hong-Wei Wu2, Jian-Yong Yang2
1School of Mechanics and Photoelectric Physics, Anhui University of Science and Technology, Huainan Anhui, 232001, China. chenphysics@126.com.
Abstract:
We theoretically investigate the nonlinear optical phenomena including optical bistability and four-wave mixing (FWM) process in a composite photonic-molecule cavity optomechanical system. The photonic-molecule cavity consisted of two whispering gallery mode (WGM) microcavities, where one WGM cavity is an optomechanical cavity with high-cavity dissipation κ and the other WGM cavity is an auxiliary ordinary optical cavity with high-quality factor (Q). Controlling the parameters of the system, such as the coupling strength J between the two cavities, the decay rate ratio δ of the two cavities, and the pump power P, the optical bistability can be controlled. Furthermore, the FWM process which presents the normal mode-splitting is also investigated in the FWM spectrum under different parameter regimes. Our study may provide a further insight of nonlinear phenomena in the composite photonic-molecule optomechanic systems.
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