Typical result for the time evolution of the electric field. The laser frequency is 0.057 a.u. (3.1 eV) and the peak laser intensity is 8.3 × 1012 W/cm2. (a)The blue dashed line represents the applied electric field and the red solid line represents the electric field in bulk diamond. (b) The energy transfer to electrons. (c) The HHG spectrum calculated by the Fourier transformation of the electronic current.
The time evolution of the electronic current generating the (a) 1st, (b) 3rd, (c) 5th, (d) 7th, (e) 9th, and (f) 11th harmonics. Each current is calculated by the inverse Fourier transformation of the current.
Laser intensity dependence of HHG spectrum with frequencies of (a) 0.057 a.u. (1.55 eV) and (b) 0.114 a.u. (3.1 eV). The intensity of the HHG spectrum is normalized by the fundamental intensity.
Dependence of the strength of the individual harmonics on laser intensity with the laser frequencies of (a) 0.057 a.u. (1.55 eV) and 0.114 a.u. (3.1 eV).
Laser intensity dependence of the energy transfer to electrons with the laser frequencies of 1.55 eV and 3.1 eV.
The external electric field (blue dashed line) and the total electric field (red solid line) with . The laser frequency is 0.114 a.u. (3.1 eV).
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