Nonlinear optical absorption features in few-layered hybrid Ti<sub>3</sub>C<sub>2</sub>(OH)<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>F<sub>2</sub> MXene for optical pulse generation in the NIR region
Lihua Cao, Hongwei Chu, Han Pan, Rui Wang, Ying Li, Shengzhi Zhao, Daozhi Li, Han Zhang, Dechun Li
Abstract
In the present work, we report the structural properties of the two dimensional (2D) few-layered Ti 3 C 2 (OH) 2 /Ti 3 C 2 F 2 hybrid MXene synthesized via the HF acid etching method. Various characterizations were exploited to demonstrate the 2D layered structural properties of the hybrid MXene membranes. The density functional theory (DFT) simulation indicated the hybrid MXene possessed the small enough band gap, which could benefit the nonlinear optical applications in the infrared region. By the conventional open-aperture Z-scan technique, typical nonlinear saturable features were measured. Consequently, the hybrid MXene membranes exhibited the excellent saturable absorption properties at 1 and 1.3 µm. As a saturable absorber, passively Q-switched Nd:YVO 4 lasers with the prepared hybrid MXene membranes were realized at 1 and 1.3 µm, respectively, producing the stable Q-switching pulse train with a shortest duration of 130 ns.