Fig. 1. Lattice structure and Raman spectrum of excited at 532 nm 的晶格结构和 薄膜的拉曼光谱（532 nm）

Fig. 2. AFM image and flatness information of SnSe₂ thin film 薄膜的AFM成像图与粗糙度信息

Fig. 3. Pump probe system based on amplifier

Fig. 4. Carrier relaxation signal of and phonon oscillation in the first 80 ps 的载流子弛豫信号及前80 ps的声子振荡

Fig. 5. Carrier and phonon dynamics of SnSe₂ films at different energy densities

Fig. 6. ∆T⁄T signal and fitting results for a pumping energy density of 0.92 mJ/cm²抽运能量密度为0.92 mJ/cm²下 信号及拟合结果

Fig. 7. Peak signal and time constant fitting of SnSe₂films at different pumping energy densities

Fig. 8. SnSe₂ series fitting results of thin films at different pumping energy densities

Fig. 9. Fast Fourier transform curve of coherent acoustic phonon oscillation signals of SnSe₂ film under different pump power densities