High order harmonic generation in triatomic molecules 


S. Barmaki*, S. Laulan

Secteur Sciences, Université de Moncton-campus de Shippagan,

218 boulevard J. D.  Gauthier, Shippagan, New-Brunswick, Canada, E8S 1P6

* Corresponding author. E-mail: samira.barmaki@umcs.ca

Received: 20 November 2008; revised version accepted: 10 June 2009



     We present a study of the nonlinear process of the high order harmonic generation (HHG) in the H32+ triatomic molecular hydrogen ion submitted to 20-cycle intense laser pulse of intensity I = 4 ´ 1014 Wcm-2 and wavelength ? = 800 nm. The HHG spectra are calculated numerically by resolving the 3-D time-dependent Schrödinger equation describing the electron motion in the presence of laser pulse using the split-operator technique. Results for several internuclear distances between the H32+ fragments are presented. The extension of the HHG cutoff compared to the atomic case is discussed.


Keywords : Nonlinear processes; High order harmonic generation ; Molecular triatomic ion;  numerical simulation; Laser control.

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