Fig. 1. Electric field and vector potential of laser field when I=3.0×1014 W·cm-2,λ=800 nm, CEP=0, and Γ=5 fs

Fig. 2. 2D momentum spectra of H atom with SFA method. (a) A window and C window; (b) A window and B window; (c) B window and C window; (d) A window, B window, and C window

Fig. 3. 2D momentum spectra of H atom with CVA method. (a) A window and C window; (b) A window and B window; (c) B window and C window; (d) A window, B window, and C window

Fig. 4. Photoelectron energy spectra with CVA method. (a) Intracycle interference; (b) intercycle interference; (c) combined action of intercycle and intracycle interferences

Fig. 5. 2D photoelectron momentum spectra of H atom. (a) SFA; (b) CVA; (c) TDSE

Fig. 6. Photoelectron energy spectra of H atom. (a) SFA; (b) CVA; (c) TDSE

Fig. 7. 2D photoelectron momentum spectra of H atom based on TDSE when I=3.0×1014 W·cm-2, λ=800 nm, and CEP=0. (a) 2T; (b) 4T; (c) 8T

Fig. 8. 2D photoelectron momentum spectra of H atom. (a) SFA; (b) CVA; (c) SFA2