Synthesis and Third-Order Nonlinear Synergistic Effect of ZrO2/RGO Composites.

Xinting Zhao,Yuzong Gu,Fangfang Wang,Jiawen Wu,Baohua Zhu

doi:10.3390/nano11102741

Abstract

Tuning the third-order nonlinear properties of graphene by hybrid method is of great significance in nonlinear optics research. ZrO2/reduced graphene oxide (RGO) composites with different ZrO2 concentrations were prepared by a simple hydrothermal method. The morphology and structure show that ZrO2 nanoparticles were uniformly dispersed on the surface of graphene nanosheets. The nonlinear optical (NLO) characteristics of composites with different ZrO2 concentrations were studied by the Z-scan technique of 532 nm picosecond pulsed laser. The results showed that ZrO2/RGO composites had saturated absorption and positive nonlinear refraction characteristics. Meanwhile, the third-order nonlinear susceptibility of the ZrO2/RGO composite with a 4:1 mass ratio of ZrO2 to graphene oxide could reach 23.23 × 10−12 esu, which increased tenfold compared to RGO, and the nonlinear modulation depth reached 11.22%. Therefore, the NLO characteristics could be effectively adjusted by controlling the concentration of ZrO2, which lays a foundation for further research on the application of ZrO2/RGO composites in NLO devices.

Highlights

Nanomaterials 2021, 11, 2741. https://Nonlinear optical (NLO) materials are very important for application in optical communication, optical computation and optical signal processing [1,2,3], and are of great importance in the study of materials with excellent nonlinear properties [4,5,6,7]
The morphology of the samples GO, ZrO2 and ZrO2 /reduced graphene oxide (RGO) nanocomposites was characterized by scanning electron microscopy and transmission electron microscopy
ZrO2 /RGO nanocomposites were synthesized by the hydrothermal method and their

Summary

Introduction

Nanomaterials 2021, 11, 2741. https://Nonlinear optical (NLO) materials are very important for application in optical communication, optical computation and optical signal processing [1,2,3], and are of great importance in the study of materials with excellent nonlinear properties [4,5,6,7]. In order to expand the application of graphene and improve the optical nonlinearity, people have studied graphene hybrid composites, which have obvious nonlinearity [12,13,14]. Hybrid composites, such as transition metal sulfides and metal selenides, which were compounded with graphene to enhance the nonlinear properties, have been developed [4,15,16]. Rajeswari et al studied the strong reverse-saturation absorption (RSA) property of WO3 /reduced graphene oxide (RGO) hybrid material under the excitation of 532 nm, and obtained the third-order nonlinear optical susceptibility χ(3) of 9.727 × 10−8 esu [17]. Jiang et al studied the graphene-titanium dioxide hybrid nanostructure and observed an RSA effect at 700 nm and a saturation absorption (SA)

Results

Discussion

Conclusion