Nanomaterials with promising optical, mechanical and electrical properties have garnered significant interest in photonics and electronics. However, the integration of nanomaterials with diverse characteristics for potential ultrafast photonics applications has emerged as a focal point. In this study, two-dimensional MXene (Ti₃C₂T_x) and CuO nanoparticles were synthesized to create heterostructure materials. The surface morphology, chemical composition and nonlinear absorption properties of the heterostructure materials were investigated. First-principle-based theoretical calculations were performed to explore the electronic and optical properties of the Ti₃C₂T_x/CuO heterojunction, offering insights into its essential properties and supporting the potential optoelectronic applications. Importantly, the Ti₃C₂T_x/CuO heterojunction effectively functioned as saturable absorbers in ultrafast lasers. Incorporating the Ti₃C₂T_x/CuO-based saturable absorber into a net-anomalous dispersion fiber cavity generated stable conventional-soliton pulses with duration of 495 fs. Additionally, adjusting cavity dispersion to net-normal allowed the Ti₃C₂T_x/CuO-based saturable absorber to generate dissipative soliton with a pulse width of 22 ps. The performance of Ti₃C₂T_x/CuO-based fiber lasers demonstrates enhancements over previous works. This study confirms that the Ti₃C₂T_x/CuO heterojunction is a promising nonlinear optical material for ultrafast applications and advanced MXene-based photonic devices.

中文翻译：

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用于超快光子学的 Ti3C2Tx/CuO 异质结


具有良好光学、机械和电气性能的纳米材料在光子学和电子学领域引起了极大的兴趣。然而，将具有不同特性的纳米材料集成用于潜在的超快光子学应用已成为一个重点。在这项研究中，合成了二维 MXene （Ti₃C₂T_x） 和 CuO 纳米颗粒以制造异质结构材料。研究了异质结构材料的表面形貌、化学成分和非线性吸收性能。进行了基于第一性原理的理论计算，以探索 Ti₃C₂T_x/CuO 异质结的电子和光学特性，从而深入了解其基本特性并支持潜在的光电应用。重要的是，Ti₃C₂T_x/CuO 异质结在超快激光器中有效地起到了可饱和吸收器的作用。将基于 Ti₃C₂T_x/CuO 的可饱和吸收体整合到净异常色散光纤腔中，产生了持续时间为 495 fs 的稳定常规孤子脉冲。此外，将腔体色散调整为净法向允许基于 Ti₃C₂T_x/CuO 的可饱和吸收器产生脉冲宽度为 22 ps 的耗散孤子。基于 Ti₃C₂T_x/CuO 的光纤激光器的性能证明了对以前工作的增强。本研究证实了 Ti₃C₂T_x/CuO 异质结是一种很有前途的非线性光学材料，适用于超快应用和先进的基于 MXene 的光子器件。