Dissociation of C-H molecular bond of methane by pulse shaped ultra-intense laser field

► Photo-dissociation of C-H bond of the methane has been investigated theoretically. ► A number of results in the emerging field of laser pulse with intensity 8 × 10 13 W cm−2 and pulse duration 100 fs are presented. ► The dissociation probability is carried out by time dependent Schrödinger equation using grid spectral method. ► The effect of laser field and pulse width on the dissociation probability is explained. ► The dissociation probability is improved by modifying pulse shape in two-rectangular pulse shape.