TITLE:
Nonlinear Ionization of Molecules by Intense Transform-Limited Gaussian Laser Pulses
AUTHORS:
Samira Barmaki, Salima Hennani, Marc-André Albert, Stéphane Laulan
KEYWORDS:
Nonlinear Ionization Process, Intense Femtosecond Laser Fields, Multiphoton Absorption in Molecular Continuum, Transform-Limited Gaussian Laser Pulse
JOURNAL NAME:
Optics and Photonics Journal,
Vol.4 No.11,
November
24,
2014
ABSTRACT: We
present in this paper an investigation of the nonlinear process of above-threshold
ionization. The process arises when an atomic or molecular system, exposed to
an intense laser pulse, continues to absorb more photons than that needed for
the ionization to occur. We trigger this nonlinear process in a simple
molecular system by exposing it to an intense transform-limited Gaussian laser
pulse of 267-nm wavelength which is the third harmonic of an 800-nm wavelength
Tisapphire laser. We explore the characteristics of the process by analyzing
the kinetic-energy spectra of the electrons ejected from the molecular system
under different laser peak intensities.