Abstract
Graphene has received significant attention due to its excellent properties currently. In this work, a nano-optomechanical system based on a doubly-clamped Z-shaped graphene nanoribbon (GNR) with an optical pump-probe scheme is proposed. We theoretically demonstrate the phenomenon of phonon-induced transparency and show an optical transistor in the system. In addition, the significantly enhanced nonlinear effect of the probe laser is also investigated, and we further put forward a nonlinear optical mass sensing that may be immune to detection noises. Molecules, such as NH3 and NO2, can be identified via using the nonlinear optical spectroscopy, which may be applied to environmental pollutant monitoring and trace chemical detection.
Highlights
Graphene, the excellent two-dimensional (2D) material, has drawn tremendous attention in recent years
We find that there are two sharp peaks at both sides of the spectra that just correspond to the vibrational frequency of the graphene nanoribbon (GNR) resonator, and the middle parts indicate the absorption and dispersion of the exciton in the GNR resonator
We have proposed a theoretical model based on a Z-shaped GNR resonator with the optical pump-probe scheme to investigate its coherent optical properties
Summary
The excellent two-dimensional (2D) material, has drawn tremendous attention in recent years. Compared with the mass sensing in the linear optics regime [33], the nonlinear optical mass sensing proposed here may be immune to detection noises (concrete elaborations are given later in the Discussions). In this present article, we theoretically study and analyze the coherent optical properties of a graphene resonator based on a doubly-clamped Z-shaped GNR [33,34] with the optical pump-probe scheme [35,36]. The scheme proposed here may have potential applications in mass sensing and all-optical graphene-based devices
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