Nonlinear absorption of CsPbBr3/antimonene blend materials prepared by laser ablation in liquid

Abstract

Recently, through the continuous research on perovskite materials, the excellent nonlinear optical properties of perovskite have been shown to the world. Nevertheless, people still try their best to improve its optical nonlinearity to make it better applied to nonlinear optical devices. In this work, the nonlinear optical performance of the perovskite quantum dot (PQD) has been studied and tested, and its reverse-saturable absorption property and optical limiting potential have been discovered. On this basis, we tried to further improve the nonlinearity of the PQD by compounding other materials that has excellent optical properties especially highly nonlinearity. It is found that the new two-dimensional (2D) Group-VA material antimonene He meets our needs. Although antimonene has excellent nonlinear optical performance, its dispersibility is poor and not easy to store. Here, we tried to incorporate PQD and antimonene to further improve its nonlinear optical performance. With the method of laser ablation in liquid (LAL), CsPbBr3/antimonene blend materials (CPBAB) with stronger nonlinear absorption and higher dispersibility were successfully prepared. The nonlinear absorption properties of CPBAB with different ablation time were studied by Z-scan technology. It was found that by adjusting the laser ablation time parameters, CPBAB with higher optical limiting ability could be prepared. In addition, this CPBAB can be encapsulated in a polymer for curing, which improves its practical application to protect human eyes and optical equipment from high-power laser damage.