Few-layered titanium carbide (${\mathrm{Ti}}_3{\mathrm{C}}_2{\mathrm{T}}_x$), a novel two-dimensional (2D) Van der Waals material in the MXene family, was fabricated with a liquid-phase method and applied as a saturable absorber for a continuous-wave mode-locked femtosecond bulk laser. Pulses as short as 316 fs with a repetition rate of 64.06 MHz and maximum output power of 0.77 W were achieved at the central wavelength of 1053.2 nm, demonstrating the first known, to the best of our knowledge, application of MXene in an all-solid-state laser. Considering the flexible band gap for different surface functional groups of ${\mathrm{Ti}}_3{\mathrm{C}}_2{\mathrm{T}}_x$, these results may promote the development of ultrafast photonics and further applications of 2D optoelectronic layered materials in the infrared and mid-infrared regions.

中文翻译：

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飞秒体激光器的几层Ti ₃ C ₂ T _x（T = O，OH或F）饱和吸收体

几层碳化钛（${钛}_3{\mathrm{C}}_{\mathrm{2个}}{\mathrm{Ť}}_X$）是MXene系列中的新型二维（2D）Van der Waals材料，采用液相方法制造，并用作连续波锁模飞秒体激光器的可饱和吸收体。在中心波长1053.2 nm处获得了短于316 fs的脉冲，重复频率为64.06 MHz，最大输出功率为0.77 W，这表明，据我们所知，这是第一个已知的MXene在全固体中的应用。态激光。考虑到不同表面官能团的柔性带隙${钛}_3{\mathrm{C}}_{\mathrm{2个}}{\mathrm{Ť}}_X$，这些结果可能会促进超快光子学的发展以及二维光电层状材料在红外和中红外地区的进一步应用。