Strengthened Optical Nonlinearity of VC Hybrids Inlaid with Silver Nanoparticles.

The investigation of nonlinear optical characteristics resulting from the light-matter interactions of two-dimensional (2D) nano materials has contributed to the extensive use of photonics. In this study, we synthesize a 2D MXene (VC) monolayer nanosheet by the selective etching of Al from VAlC at room temperature and use the nanosecond Z-scan technique with 532 nm to determine the nonlinear optical characters of the Ag@VC hybrid. The z-scan experiment reveals that Ag@VC hybrids usually exhibits saturable absorption owing to the bleaching of the ground state plasma, and the switch from saturable absorption to reverse saturable absorption takes place. The findings demonstrate that Ag@VC has optical nonlinear characters. The quantitative data of the nonlinear absorption of Ag@VC varies with the wavelength and the reverse saturable absorption results from the two-photon absorption, which proves that Ag@VC hybrids have great potential for future ultrathin optoelectronic devices.