MoS 2 /MXene pillared nanocomposite for ultrafast photonics applications.

In this work, we used nanocomposite saturable absorbers (SAs) in order to precisely design and modulate the process of compositing the light absorption by band gap engineering. Due to the higher absorption intensity of our MoS 2 /MXene nanocomposite, we have successfully shortened the pulse duration (1.2 μ s) of SA with enhancing saturable absorption intensity (7.22 MW cm -2 ), and the ultra-fast fiber laser based on this nanocomposite SA has shown wider Q-switching stable range in the case of high pump power. This strategy can efficiently improve the performance of SA and shows the potential application prospect of nanocomposites in nonlinear optics.