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We theoretically propose a hybrid system that can generate in the presence of surface acoustic wave tunable optical bistability, its switching characteristics as well as an approach to achieve manageable optomechanically induced transparency combining a SAW based optomechanical cavity and quantum dot. The fabrication of the system involves incorporating a planar distributed Bragg reflector of high-quality. In order to produce surface acoustic waves, interdigitated transducers can also be fabricated on the cavity’s surface. Optical nonlinearity present in the system generates the bistability and we study its characteristics. Further, we demonstrate that optomechanically induced transparency occurs when the hybrid optomechanical cavity system, a pump field and probe field are simultaneously introduced, leading to quantum interference between multiple energy-level pathways. Our system has applications in the fields of solid-state quantum systems and optical switches for processing quantum information. [ABSTRACT FROM AUTHOR]

This paper theoretically studies a hybrid optomechanical system embedded with two coupled quantum dots and a third-order Kerr nonlinear medium inside the cavity. The optical bistability and absorption spectrum are analyzed for the proposed system. From the Hamiltonian which describes the proposed system, a set of quantum Langevin equations are derived. Using these equations of motion, the steady-state mean field analysis is done which gives the phenomena of optical bistability. The performance of the optical switch is also analyzed in terms of gain and switching ratio. Further, the absorption spectrum of the system is derived and analyzed from the fluctuation dynamics. The optical bistability has the potential to design tunable all-optical switches. The absorption spectra display peculiar characteristics of negative absorption (transparency dip). The transparency dips are found to be strongly dependent on the frequency of the mechanical resonator. The results of our investigation reveal that the proposed system can be used as an optical switch and has numerous other applications in quantum communication systems. [ABSTRACT FROM AUTHOR]

The ability to design, fabricate and control systems which can convert photons with dissimilar frequencies has technological implications in classical as well as quantum communications. Laser heating and thermal mechanical motion in conventional micro/nanoscale optomechanical systems hamper the use of these systems in quantum information processing networks. In contrast, we propose an unconventional system comprising of a bulk quartz crystal placed within a Fabry-P e ′ rot cavity. The pumping laser is in the far-infrared region. We explore the possibility of efficient mode conversion between two optical modes supported by the system, mediated by the bulk acoustic phonons of the quartz crystal. Unlike the earlier optomechanical systems, the dark mode in our proposed system is not decoupled from the mechanical mode and yet it enables the efficient mode conversion. The novel results found in our study can be used to harness the dark state for quantum state transfer. The proposed system is robust against excessive heating. [ABSTRACT FROM AUTHOR]