Two dimensional (2D) graphene and transition metal dichalcogenides are an emerging class of extremely interesting materials showing unique physical properties, such as large third-order optical nonlinearity, offering potential applications in optical limiting. Here we report the optical limiting properties of Titanium disufide (TiS2), and Graphene sheets measured using open aperture and photo-acoustic z-scan techniques. Our best results were observed in TiS2 Sheets, yielding an optical limiting of 77% at an irradiance of 0.713 GW/cm2with 2PA and 3PA absorption coefficient to be 80cm/GW and 2000 cm3/GW2 respectively.Also, TiS2 sheets show improved shelf life and stability upon irradiation with higher laser powers. This demonstrates the feasibility of using them as a potential candidate for optical limiting applications.
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