Document Type : Original Article
Authors
1 Department of laser and Optical engineering, University of Bonab , Bonab 5551761167, Iran.
2 Department of laser and Optical engineering,, University of Bonab , Bonab 5551761167, Iran.
Abstract
In this article, the cutoff frequency and high-order harmonic plateau region for hydrogen atom and molecular ion H_2^+ are theoretically investigated. The high-order harmonic generation (HHG) is a semi-classical process that results from the interaction of a strong laser field with matter. An attosecond pulse is produced from the superposition of harmonics in the plateau region of the HHG spectrum. Here, hydrogen atom and molecular ion are used for HHG and attosecond pulse generation, and Ti-Sapphire lasers with Gaussian pulse are used as a driving field. Plasmonic field is used to optimize the cutoff frequency of HHG spectrum. The simulation results show that the plasmonic field significantly enhances the HHG spectrum. Also, the dihydrogen molecular ion is more efficient for generate the high harmonic and a single attosecond pulse than hydrogen atom in the plasmonic field.
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