Restraint of spatial distribution in high-order harmonic generation from a model of hydrogen molecular ion

Xia Chang-Long¹, Zhang Jun², Miao Xiang-Yang^{1, †}, Liu Xue-Shen^{2, ‡}

(color online) Time–frequency analysis by using transformation of the dipole acceleration in Eqs. (4) and (5). (a), (b) τ = 6 fs, φ = 0; (c), (d) τ = 5 fs, φ = 0. (a), (c) Time–frequency distribution from Eq. (4); (b), (d) time–frequency distribution from Eq. (5).