“…Since the first discovery of graphene in 2004, atomically thin two-dimensional (2D) structural materials have become a research hotspot due to their unique optoelectronic properties, establishing great advantages in the construction of photonic and optoelectronic devices [ 1 , 2 , 3 , 4 , 5 ]. With the merits of broadband absorption [ 6 , 7 , 8 , 9 ], ultrafast carrier dynamic processing [ 10 , 11 ], excellent nonlinear optical response [ 12 ], easy parameter regulation [ 13 ], easy fabrication and intergradation [ 14 ], etc., 2D materials have been widely applied as saturable absorbers (SAs) to generate pulsed lasers [ 15 , 16 , 17 ], greatly facilitating the development of ultrafast lasers [ 18 ]. Since then, investigating novel 2D material-based SAs with excellent nonlinear optical performances is still in progress and has received widespread attention in the fields of materials and lasers [ 19 , 20 ].…”