Same Period Emission and Recombination in Non-Sequential Double Recombination High-Harmonic Generation in H${}_2$

Abstract

Non-sequential double recombination (NSDR) high-order harmonic generation (HHG) is studied in a molecular system. We observe a unique molecular two-electron effect with a characteristic cutoff in the HHG spectrum at higher energies than what was previously seen for NSDR HHG in atoms. The effect is corroborated with a classical model where it is found that the effect is sensitive to the molecular potential and originates from same period emission and recombination (SPEaR) of two electrons. The effect persists for intermediate nuclear distances of $R\gtrsim 8.0$ a.u.

arXiv comment5 pages, 4 figures

References in corpus (2)

• Ultrahigh harmonics from laser-assisted ion-atom collisions
• Nonsequential Double Recombination in Intense Laser Fields

Cited by in corpus (4)

• Finite-system effects on high-harmonic generation: from atoms to solids
• Edge-state and bulk-like laser-induced correlation effects in high-harmonic generation from a linear chain
• Non-Sequential Double Recombination High Harmonic Generation in Molecular-like Systems
• Contribution of the pre-ionized H${}_2$ and the ionized H${}_2^{+}$ subsystems to the HHG Spectra of H${}_2$ in intense laser fields