Fig. 1. Schematic of the interaction between the laser pulse and the target

Fig. 2. Time evolution of the ion and electron number density

Fig. 3. Number density distribution of ion and electron at t=68.2 ps

Fig. 4. Evolution of the square of electric field intensity and the induced electrostatic field intensity

Fig. 5. Time evolution of the ion number density

Fig. 6. Relationship between peak number density and laser wavelength when the target thickness is 对靶厚为的固体靶，光栅峰值密度对激光波长的依赖关系

Fig. 7. Relationship between peak number density and target depth for different laser wavelengths

Fig. 8. Relationship between peak number density and laser wavelength when 对的厚靶，光栅峰值密度对激光波长的依赖关系

Fig. 9. Relationship between peak number density and laser pulse intensities

Fig. 10. Relationship between the time at peak number density and laser pulse intensities