Open AccessThe single attosecond pulse generated by atom exposed to two-color combined laser field
Author(s) -
Xiao-liang Ye,
Xiaoxin Zhou,
Song-Feng Zhao,
Peng-Cheng Li
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.1579
Subject(s) - attosecond , laser , helium atom , harmonics , physics , pulse (music) , field (mathematics) , atomic physics , optics , atom (system on chip) , helium , ultrashort pulse , quantum mechanics , mathematics , voltage , detector , pure mathematics , computer science , embedded system
By solving the time-dependent Schrdinger equation with split-operator method, we study the high harmonics of one-dimensional helium atom exposed to the two-color laser field composed of IR field and UV field, and analyze the characteristics of the attosecond pulse produced by the high-order harmonics. It is found that the width of the attosencond pulse is shortened by the increasing intensity of IR field in the combined laser field. By adjusting the time delay between two lasers, we can enhance the contribution of one of the electron trajectories and suppress that of the other. Thus we can obtain an isolated sub-100 as pulse.