Pub Date : 2024-01-09DOI: 10.2174/0122106812276636231228043816
Ehsan Motallebi Aghkonbad, Akbar Jafari, M. M. Aghgonbad
In this paper, graphene and copper oxide nanoparticles and graphene-based copper oxide nanoparticles have been produced by means of a pulsed laser ablation process (PLA) in a deionized water solution. The composition ratio of materials has been investigated in the structure of the prepared materials and their optical properties. The absorbance of the samples was obtained by the UV-VIS single beam spectrophotometer in the wavelength range of 290 to 800 nm. Spectroscopic ellipsometry method was used to investigate the linear optical properties of the samples including the real and imaginary parts of refractive index and dielectric function of the samples. The preferred model in the dielectric function modeling was Tauc-Lorentz. Also, the energy band gap of the samples has been calculated using Tauc relation. In addition, the nonlinear optical properties of graphene based copper oxide have been studied by Z-scan technique. Structure of the samples was studied using TEM image. The most and the least absorbance at 532 nm wavelength, and also band gap energy belong to 1.4 ml Gr-0.6 ml Cu and copper oxide, respectively. The band gap energies of the samples were calculated between 3.30 eV and 3.43 eV. The real and imaginary parts of the complex refractive index were obtained in the order of 10!!cm!/W and 10!!cm/W. The results for nonlinear properties show that these samples are suitable for all-optical switching devices
本文通过脉冲激光烧蚀工艺（PLA）制备了石墨烯和氧化铜纳米粒子以及石墨烯基氧化铜纳米粒子。样品的吸光度由 UV-VIS 单光束分光光度计在 290 至 800 nm 波长范围内测定。光谱椭偏仪方法用于研究样品的线性光学特性，包括样品折射率和介电常数的实部和虚部。介电函数建模的首选模型是陶克-洛伦兹模型。样品的能带隙也是利用陶克关系计算得出的。此外，还利用 Z 扫描技术研究了石墨烯基氧化铜的非线性光学特性。样品的带隙能在 3.30 eV 和 3.43 eV 之间，复折射率的实部和虚部分别为 10 厘米/瓦和 10 厘米/瓦。非线性特性的结果表明，这些样品适用于全光开关器件。
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