Fig. 1. Schematic illustration of isolated attosecond pulse generation in a crystal

Fig. 2. The HHG spectra generated by four different phase laser drives，isolated attosecond pulses generated by HHG and Morlet transformations of the total current

Fig. 3. A diagram of the angle of polarization with respect to a crystal in rectangular coordinates

Fig. 4. The plane polarization distribution of the FWHM and intensity of the isolated attosecond pulse

Fig. 5. HHG spectra of four types of laser polarization angles，isolated attosecond pulses generated by HHG and Morlet transformations of the total current