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Multielectron dissociative ionization of methane and formaldehyde molecules with optimally tailored intense femtosecond laser pulses

Irani, E ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.saa.2017.05.063
  3. Abstract:
  4. The multielectron dissociative ionization of CH4 and CH2O molecules has been investigated using optimum convolution of different dual tailored short laser pulses. Based on three dimensional molecular dynamics simulations and TDDFT approach, the dissociation probability is enhanced by designing the dual chirped-chirped laser pulses and chirped-ordinary laser pulses for formaldehyde molecule. However, it is interesting to notice that the sensitivity of enhanced dissociation probability into different tailored laser pulses is not significant for methane molecule. In this presented modifications, time variation of bond length, velocity, time dependent electron localization function and evolution of the efficient occupation states are presented to analyze the time evolution of molecular dynamics. This work is proved to be a potential way to reduce the controlling costs with a currently available pulse shaping technology. © 2017
  5. Keywords:
  6. Tailored short laser pulses ; Bond length ; Density functional theory ; Dissociation ; Formaldehyde ; Ionization ; Laser pulses ; Laser theory ; Methane ; Molecular dynamics ; Molecules ; Photodissociation ; Ultrafast lasers ; Ultrashort pulses ; Chirped laser pulse ; Dissociation probability ; Electron localization function ; Intense femtosecond laser pulse ; Molecular dynamics simulations ; Multielectron dissociative ionization ; Short laser pulse ; Time dependent density functional theory ; Pulse shaping
  7. Source: Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy ; Volume 185 , 2017 , Pages 298-303 ; 13861425 (ISSN)
  8. URL: https://www.sciencedirect.com/science/article/pii/S1386142517304468