Figure 1
From: Even harmonic generation in isotropic media of dissociating homonuclear molecules
HHG spectrum for a pulse of 800 nm, I = 3 × 1014 W/cm2 and 5 (a), 10 (b), 14 (c) and 20 (d) optical cycles for 
, 
and 
. The dashed vertical lines indicates odd harmonics. The thick vertical lines indicate the ionization threshold (left line) and the cut-off energy obtained from Ecutoff = Ip + 3.17Up (right line).
