⚡ High-Harmonic Generation from Gas

Single-atom response via the Lewenstein model (PRA 49, 2117, 1994). Length gauge, hydrogenic 2p→1s dipole.

●

Atom

λ₀800 nm

τ₀ (FWHM)25 fs

I₀ (peak)4.0 ×10¹⁴ W/cm²

CEP φ0 π

E₀ (peak)– V/Å– a.u.

T_grid100 fs

N (points)8192

τ_max0.75 T₀

Time domain — driving field & induced dipole

E(t)/E₀

d(t) (norm.)

HHG yield

Ip+3.17Up

I_p–

U_p–

Cutoff–

Cutoff harm.–

Keldysh γ–

τ_max–

Time window ±50 fs

Freq. range150 eV

Floor-150 dB