Nonlinear Optical Properties of Few-Layer Rhenium Disulfide Nanosheets and Their Passively Q-switched Laser Application

摘要

Rhenium disulfide nanosheets (ReS2 NSs) are attracting increasing attention because of their unique layerindependent physicochemical properties, however, their nonlinear optical (NLO) properties are less investigated. Herein, ReS2 NSs are successfully exfoliated by the sonication assisted liquid phase exfoliation method. Their broadband NLO responses are studied by open aperture and closedaperture Zscan technique at 5321342nm. The ReS2 NSs dispersion exhibits saturable absorption, nonlinear scattering, and refraction responses. Broadband saturable absorption responses are also observed for the ReS2 NSs film on the glass substrate. Additionally, twophoton absorption response is shown at 1342nm at larger excitation energy. The saturable absorption of ReS2 NSs makes it possible to fabricate the saturable absorber with the asprepared nanosheets. Passively Qswitched laser operations are realized at 1.06 and 1.3µm. These results have revealed the potential of ReS2 NSs in versatile NLO applications.