Zhao Xinting, Wang Fangfang, Wu Jiawen, Zhu Baohua, Gu Yuzong
Physics Research Center for Two-Dimensional Optoelectronic Materials and Devices, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
Key Laboratory of Infrared Imaging Materials and Detectors, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China.
Nanomaterials (Basel). 2021 Oct 16;11(10):2741. doi: 10.3390/nano11102741.
Tuning the third-order nonlinear properties of graphene by hybrid method is of great significance in nonlinear optics research. ZrO/reduced graphene oxide (RGO) composites with different ZrO concentrations were prepared by a simple hydrothermal method. The morphology and structure show that ZrO nanoparticles were uniformly dispersed on the surface of graphene nanosheets. The nonlinear optical (NLO) characteristics of composites with different ZrO concentrations were studied by the Z-scan technique of 532 nm picosecond pulsed laser. The results showed that ZrO/RGO composites had saturated absorption and positive nonlinear refraction characteristics. Meanwhile, the third-order nonlinear susceptibility of the ZrO/RGO composite with a 4:1 mass ratio of ZrO to graphene oxide could reach 23.23 × 10 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 ZrO, which lays a foundation for further research on the application of ZrO/RGO composites in NLO devices.
通过混合方法调节石墨烯的三阶非线性特性在非线性光学研究中具有重要意义。采用简单的水热法制备了不同ZrO浓度的ZrO/还原氧化石墨烯（RGO）复合材料。形貌和结构表明，ZrO纳米颗粒均匀分散在石墨烯纳米片表面。利用532 nm皮秒脉冲激光的Z扫描技术研究了不同ZrO浓度复合材料的非线性光学（NLO）特性。结果表明，ZrO/RGO复合材料具有饱和吸收和正非线性折射特性。同时，ZrO与氧化石墨烯质量比为4:1的ZrO/RGO复合材料的三阶非线性极化率可达23.23×10 esu，相比RGO提高了10倍，非线性调制深度达到11.22%。因此，通过控制ZrO的浓度可以有效调节NLO特性，为ZrO/RGO复合材料在NLO器件中的应用进一步研究奠定了基础。
