Schematic illustration of an ellipsoidal defect. The picture shows how the incident laser electric field is oriented.
Evolution of the surintensity as a function of the normalized CB electron density for various (a) collisional times, (b) defect aspect ratio, (c) wavelengths, and (d) optical indices of the defect.
Evolution of the CB electron density as a function of time for ( , blue curves) and ( , red curves). Full and dashed curves correspond to the numerical and approximated analytical solution of Eq. (8) , respectively. No time-dependent surintensity is included for the dotted curves.
Evolution of (a) the CB electron density, (b) the intensity enhancement, (c) the Keldysh ionisation rate, and (d) the Keldysh parameter as a function of time. The electron density is only driven by electric field ionisation and enhancement. Results for various wavelengths are displayed. In all cases, the incident laser intensity is set to
Evolution of (a) the optical avalanche time, (b) the ionization rate at t = 0, and (c) the Keldysh parameter at t = 0 as a function of the laser wavelength. The incident laser intensity is set to . The electron density is only driven by the electric field ionization and enhancement in these calculations. The inset of (b) shows the temporal evolution of the ionization rate for (black curve) and (red curve).
Evolution of the CB electron density as a function of time when electrons can recombine. The dotted and dashed curves correspond to the cases without time-dependent surintensity ( ) and with S(t), respectively. The recombination time is and the incident laser intensity . The solid curve corresponds to the case where no recombination occurs.
Evolution of the CB electron density as a function of time when impact ionization can occur for (a) and (b) , and with physical parameters given in Table I .
List of parameters and variables.
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