“…[ 10,11] Therefore, it is of great significance to study 2D TMCs, [12,13] especially as SA to achieve pulsed laser. [14][15][16][17][18] At present, many outstanding nano materials such as semiconductor saturable absorption mirror (SESAM), graphene, black phosphorus (BP), topological insulators (TI), carbon nanotube (CNT), bismuthene, gold nanoparticles, MXene, chalcogenides, graphdiyne (GD), metal organic frameworks (MOFs), inorganic semiconductors, metal oxides, heterojunctions as SAs have been extensively studied, but they also have some shortcomings. [19] For example, graphene has no adjustable bandgap structure, so its application is greatly limited.…”