In the present work, we synthesize an Fe₃O₄@Ti₃C₂ MXene hybrid nanomaterial. Comprehensive investigation on the morphology and structure of the prepared Fe₃O₄@Ti₃C₂ MXene demonstrates the strong interaction between Ti₃C₂ MXene and Fe₃O₄ nanoparticles. The open-aperture Z-scan technology is utilized to study the nonlinear absorption features of the Fe₃O₄@Ti₃C₂ MXene nanocomposite from 1 to 2 μm, showing a large modulation depth and a relatively low saturable intensity. The nonlinear absorption properties make the prepared Fe₃O₄@Ti₃C₂ MXene hybrid nanomaterial a potential photonic device for optical pulse generation. As a consequence, passively Q-switched bulk lasers based on the prepared Fe₃O₄@Ti₃C₂ MXene nanomaterial saturable absorber are demonstrated in the operation band of 1–2 μm for the first time, producing the shortest pulse duration of 119 ns. The corresponding highest pulse energy and the maximum pulse energy are 0.6 μJ and 2.3 W, respectively. Our results confirm that the Fe₃O₄@Ti₃C₂ MXene hybrid nanomaterial we synthesized possesses a large optical nonlinearity, which could be a candidate for optical pulse generation in a wide operating band from 1 to 2 μm.

中文翻译：

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新型Fe3O4 @ Ti3C2 MXene杂化纳米材料的合成及光学非线性研究，尺寸为1-2μm

在目前的工作中，我们合成了Fe ₃ O ₄ @Ti ₃ C ₂ MXene杂化纳米材料。对制备的Fe ₃ O ₄ @Ti ₃ C ₂ MXene的形貌和结构的综合研究表明，Ti ₃ C ₂ MXene与Fe ₃ O ₄纳米颗粒之间具有很强的相互作用。利用开孔Z扫描技术研究Fe ₃ O ₄ @Ti ₃ C ₂的非线性吸收特性MXene纳米复合材料的厚度为1至2μm，显示出较大的调制深度和相对较低的饱和强度。非线性吸收特性使所制备的Fe ₃ O ₄ @Ti ₃ C ₂ MXene杂化纳米材料成为潜在的光脉冲产生光子器件。因此，首次在1–2μm的工作频带中展示了基于制备的Fe ₃ O ₄ @Ti ₃ C ₂ MXene纳米材料可饱和吸收剂的被动Q开关体激光器，产生了最短的脉冲持续时间119 ns。相应的最高脉冲能量和最大脉冲能量分别为0.6μJ和2.3W。我们的结果证实了铁我们合成的₃ O ₄ @Ti ₃ C ₂ MXene杂化纳米材料具有较大的光学非线性，这可能是在1至2μm的较宽工作频带内产生光脉冲的候选。