Open AccessDynamic characteristics of electrons in high-order corrected fields of ultrashort laser pulses
Author(s) -
Hua Jian-Fei,
Huo Yu-Kun,
Lin Yu-Zheng,
Zhao Chen,
Yingping Xie,
Shaoyin Zhang,
Yan Zheng,
Jun Xu
Publication year - 2005
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.54.653
Subject(s) - paraxial approximation , physics , amplitude , ultrashort pulse , radius , laser , pulse (music) , multiphoton intrapulse interference phase scan , pulse duration , optics , gaussian beam , electron , field (mathematics) , femtosecond pulse shaping , atomic physics , beam (structure) , quantum mechanics , computer security , mathematics , detector , pure mathematics , computer science
Highorder correction to the fields of ultrashort, tightlyfocused laser pulses expressed in power series of ε=1/(ω0t0) and s=1/(k0w0)ω0=ck0 the central oscillatory frequency, t0 the pulse duration, w0 the beam waist radius), are derived. Based on paraxial approximation, the firstorder correction terms to the Gaussian pulses are explicitly given. Their corrections of amplitude and phase, are found to be related to the variable of ε. Applying them to the study of the electron dynamics in the intense laser pulse field, we found that as long as ω0t0>20, the zerothorder approximation (long pulse approximation) is adequate for describing the interaction. For ω0t0<20, higherorder corrections have to be taken into account.