Controllable optical output fields from an optomechanical system with mechanical driving

Abstract

We investigate the properties of the optical output fields from a cavity optomechanical system, where the cavity is driven by a strong coupling and a weak probe optical fields and the mechanical resonator is driven by a coherent mechanical pump. When the frequency of the mechanical pump matches the frequency difference between the coupling and probe optical fields, due to the interference between the different optical components at the same frequency, we demonstrate that the large positive or negative group delay of the output field at the frequency of probe field can be achieved and tuned by adjusting the phase and amplitude of the mechanical driving field. Moreover, the strength of the output field at the frequency of optical four-wave-mixing (FWM) field also can be controlled (enhanced and suppressed) by tuning the phase and amplitude of the mechanical pump. We show that the power of the output field at the frequency of the optical FWM field can be suppressed to zero or enhanced so much that it can be comparable with and even larger than the power of the input probe optical field.

Selective and switchable optical amplification with mechanical driven oscillators

“…The transitions |m, n 1 , n 2 ↔ |m + 1, n 1 , n 2 , |m, n 1 + 1, n 2 ↔ |m + 1, n 1 , n 2 , and |m, n 1 , n 2 ↔ |m, n 1 + 1, n 2 can be achieved by applying a probe field, an optical pump field, and a mechanical pump field. Clearly, the three couplings result in a closedloop ∆-type transition strcture, leading to the phasesensitive optical behaviors of the OMIT system [78][79][80]. As shown in Fig.…”

“…Here we find that, by selectively driving the mechanical resonators, the OMIT peaks and the accompanied optical group delays can be significantly altered. In comparison with the case of only a single driven oscillator [78][79][80][81][82][83][84], in our system, we can achieve symmetric or asymmetric suppressions or amplifications of double OMIT peaks, which is accompanied by either significantly enhanced advance or a transition from advance to delay of the signal light. Our results confirm that multi-mode OMIT devices with selective acoustic control, provide a versatile route to realize coherent multiband modulations, switchable signal amplifications, and COM based light communications.…”

“…4(a)] can emerge due to the abnormal dispersion [23]. In contrast, by introducing active gain into the system, fast light can be observed in experiments [32,79,92]. A merit of our system is the ability to selectively achieve either slow light or fast light by controlling the mechanical parameters.…”

Phase-dependent double optomechanically induced transparency in a hybrid optomechanical cavity system with coherently mechanical driving*

“…More importantly, the coupling strength between them can be modulated flexibly [48,49]. As to the mechanical driving field, there are many forms of driving forces can be applied, for example, the mechanical resonators can be driven by the piezoelectric forces, which a mechanical resonator is fabricated with piezoelectric materials [50][51][52][53]; the mechanical resonators can also be driven by the Lorentz forces, which a current-carrying resonator is placed in the magnetic field [18,19].The hybrid optomechanical cavity systems with coherently mechanical driving has been studied in many fields, include realizing single [25,54,55] and double [10] optomechanically induced opacity and amplification, and weak-force measurement [56]. Relative to those systems, our scheme has the following features: (i) our scheme can realize the switch between the double-OMIT and the single-OMIT, which can be controlled by many forms of the mechanical driving fields, such as the piezoelectric forces and Lorentz forces.…”

Single-photon multi-ports router based on the coupled cavity optomechanical system

“…Cavity optomechanical systems, besides its potential application in detecting gravity waves1112, in studying quantum-to-classical transitions13, in performing high precision measurements14151617, in entanglement generation181920 and preservation21 and in processing quantum information1622232425, are of nonlinearity26272829303132. But this nonlinear strength proportional to g 2 / ω m is limited by the condition g (the coupling strength of radiation pressure) less than ω m (the frequency of the mechanical oscillator), therefore, a lot of effort is devoted to enhance the nonlinearity, for instance, adding atoms33, introducing quantum dot34, using coupled cavity optomechanical system27 and employing three-mode mixing to generate effective photon blockade35.…”