电子辐照制备二维锑烯光限幅材料

块状材料锑粒通过液相剥离成功制备了锑烯纳米片。采用扫描电镜、紫外-可见吸收光谱和拉曼光谱对所制锑烯进行了表征，制备的锑烯纳米片展现出从紫外区到可见光区的宽谱吸收，并且展现出锑的拉曼特征峰，微观结构上展示出二维纳米片状的独特结构。利用Z-扫描技术对所制样品的三阶非线性光学性质测试发现，在脉冲宽度为4 ns、波长为532 nm的激光光源激发下，锑烯展示出饱和吸收的性质，其非线性吸收系数为-7.8610-11 m/W。通过对样品进行电子辐照，成功获取了具有光限幅性质的二维锑烯。辐照后的锑烯展示出反饱和吸收的性质，非线性吸收系数为8.6910-11 m/W。

Optical limiting two-dimensional antimonene via electron irradiation

Antimonene was prepared through liquid phase exfoliation of bulk materials. The as-prepared sample was characterized by scanning electron microscope (SEM), ultraviolet-visible (UV-vis) absorption spectroscopy, and Raman scattering spectroscopy in details. Broad absorption from ultraviolet to visible region was observed in the UV-vis absorption spectra. Two typical peaks assigned to Sb were detected in Raman spectra. A flat typical structure corresponding to two-dimensional materials was observed in microscopic characterization. Then Z-scan technique was utilized to test the third-order nonlinear optical properties of the sample. The as-prepared antimonene exhibited saturation absorption when excited by a laser source with pulse width of 4 ns and wavelength of 532 nm. The nonlinear absorption coefficient was -7.8610-11 m/W. Upon electron irradiation, antimonene was successfully transformed into optical limiting materials, which exhibited reverse saturable absorption with a nonlinear absorption coefficient of 8.6910-11 m/W.