Author Affiliations
State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, Chinashow less
Fig. 1. Typical high-order harmonic spectrum
[16] Fig. 2. Diagram of three-step model of HHG in gas
[17] Fig. 3. Dependence of intensity of high-order harmonics on ellipticity of driving laser
[19] Fig. 4. High-order harmonics of ZnO
[10]. (a) Harmonic spectra under different intensities of driving laser ; (b) dependence of cutoff frequency on electric field intensity of driving laser
Fig. 5. Dependence of solid high-order harmonic yield on ellipticity of fundamental frequency light field. (a) Solid Ar
[20]; (b) MgO crystal
[21] Fig. 6. Diagram of three-step model in momentum space of solid high-order harmonics
[12] Fig. 8. Effect of two-color laser field on high-order harmonics
[26]. (a) High-order harmonic spectra generated under different driving laser field; (b) tunneling ionization rate and traveling time of electron in fundamental frequency laser field and orthogonal two-color laser field
Fig. 9. Enhance high-order harmonics by nanostructures
[35].(a) SEM image of antenna array on ZnO; (b) high-order harmonics of ZnO with (curve ①) and without (curve ②) antenna
Fig. 10. High-order harmonic response of silicon for different driving laser ellipticity and sample rotation angle
[43]. (a) 5
th order; (b) 7
th order; (c) 9
th order
Fig. 11. HHG of hard X-ray
[45]. (a) Diagram of HHG of hard X-ray; (b) harmonic spectrum generated under driving laser of different wavelengths
Fig. 12. Two gating schemes for generating isolated attosecond pulses
[46]. (a) Amplitude gating; (b) temporal gating
Fig. 13. Development of duration of isolated attosecond laser pulse
Fig. 14. Attosecond pulse from polycrystal SiO
2[54]. (a) Temporal profile; (b) spectral profile
Fig. 15. Transient absorption spectra of CF
4 at carbon K-edge
[57]. (a) Ionization and dissociation of CF
4 induced by 800 nm infrared laser; (b) relationship between absorption spectra of CF
4 at carbon K-edge and delay of two lasers; (c) diagram of elected transition orbits
Fig. 16. Trajectory resolved high-order harmonic spectra
[58]. (a) High-order harmonic spectrum of D
2 molecule; (b) high-order harmonic spectrum of H
2 molecule; (c) integrated signal of intensity of high-order harmonic spectrum
Fig. 17. Ultrafast vacuum ultraviolet laser spectrometer based on gaseous high-order harmonics. (a) Connected with velocity map imaging spectrometer, for studying atomic and molecular physics;(b)connected with photoemission electron microscope,for studying photoelectron dynamics of solid material and micro-nano structure
Fig. 18. High-order harmonic spectrum generated by driving laser with different wavelengths
Fig. 19. High-order harmonic spectrum of ZnO crystal