Abstract

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.

© 2018 Optical Society of America

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