Optomechanically induced transparency and nonlinear responses based on graphene optomechanics system

Hua-Jun Chen

doi:10.1140/epjqt/s40507-019-0073-z

Abstract

Due to its unique properties of low mass density, high frequency, high quality-factor and intrinsically small size, graphene has received significant attention and is considered as an ideal material for fabricating nanomechanical systems. In this work, we demonstrate theoretically the coherent optical propagation under different detuning regimes in the graphene resonator-microwave cavity system. In the red detuning, optomechanically induced transparency induced the slow light effect is investigated and the maximum group delay can reach 0.4 ms. In the blue detuning, advancing microwave signal can reach 0.12 ms, and the parametric amplification process can behave as an optical transistor to amplify a weak microwave field via manipulating the pump field. Further, we research the nonlinear effects of four-wave mixing (FWM), and the FWM intensity can be efficiently controlled and modulated by the pump power, such as FWM spectrum can present the phenomenon of normal mode splitting with controlling the pump power. A straightforward optical means for determining the frequency of the resonator by the FWM spectrum is also presented. The graphene optomechanics may indicate applications in quantum information processing.

Highlights

Graphene, atomically thin two-dimensional (2D) nanomaterial consisting of a single layer of carbon atoms, has received tremendous attention in recent years
It is clearly see that the transmission spectrum of the probe beam shows a significant transparency window at s = 0 in the presence of a pump field, and the transparency window can be modulated effectively by the pump field, which has been demonstrated by several groups in optomechanical and electromechanical system [13, 25, 27]
When the radiation pressure force drives the vibration of the graphene resonator, the displacement x of the nanomechanical resonator from its equilibrium position will alter the capacitance of the microwave cavity and its resonance frequency

Summary

Introduction

Atomically thin two-dimensional (2D) nanomaterial consisting of a single layer of carbon atoms, has received tremendous attention in recent years. We demonstrate the tunable ultraslow light effect based on the phenomena of OMIT [24,25,26,27] in the graphene nanomechanical resonator-microwave cavity system, and the maximum group delay of the transmitted probe field is about 0.4 ms.

Results

Conclusion