Nonlinear Ionization of Molecules by Intense Transform-Limited Gaussian Laser Pulses

• 作者: Marc-André Albert Salima Hennani Samira Barmaki Stéphane Laulan
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 医学
• 关键词: Nonlinear IONIZATION Process INTENSE Femtosecond LASER Fields Multiphoton Absorption in Molecular Continuum Transform-Limited GAUSSIAN LASER Pulse
• 年，卷（期）: 2014,（11）
• 页码范围: 309-315
• 页数: 7页
• 分类号: R73

摘要

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.