Selection of quantum path in high-order harmonics and isolated sub-100 attosecond generation in few-cycle spatially inhomogeneous laser fields<xref ref-type="fn" rid="cpb141972fn1">*</xref>

Selection of quantum path in high-order harmonics and isolated sub-100 attosecond generation in few-cycle spatially inhomogeneous laser fields*

Ge Xin-Lei, Du Hui, Wang Qun, Guo Jing†, Liu Xue-Shen‡

The time-frequency distribution of the HHG spectra corresponds to (a) the solid black curve ( ε = 0 a.u.), (b) the dashed red curve ( ε = 0.003 a.u.), (c) the dotted green curve ( ε = 0.0048 a.u.) in Fig. 1 . The abbreviation o.c. denotes the optical cycle.