Fig. 1. Experimental data of HHG from ZnO crystal^［13］

Fig. 2. Experimental setup for coherent extreme ultraviolet（EUV）radiation from SiO₂ thin film and the measured high-harmonic spectra^［21］

Fig. 3. High-harmonic spectra from solid Ar^［23］

Fig. 4. Crystallographic orientation dependent harmonic spectra frommonolayer MoS₂^［25］

Fig. 5. Fabrication of the metal-sapphire nanostructure and the measured high harmonic spectra^［28］

Fig. 6. Reconstruction of the energyband by means of HHG-solid^［35］

Fig. 7. Reconstruction of the valence electron potential and density of MgF₂^［51］

Fig. 8. Microscopic mechanisms for atomic and solid-state HHG^［11］

Fig. 9. Retrieval of Berry curvature in single-crystal α-quartz^［50］

Fig. 10. Band structure and high-harmonic spectra calculated by solving the TDSE in velocity gauge ^［69］

Fig. 11. Real-space representation for HHG from noncentro symmetric systems^［83］

Fig. 12. Three-step model for monolayerh-BN^［140］ and four-step model for distant bilayer h-BN，and corresponding high-order harmonics spectra^［127］