Schematic illustration of the band structure and of the sequential one-photon absorption at .
Evolution of (a) the temperature, (b) electronic densities, and (c) absorbed power density as a function of time (up to 600 ps) at the center of the precursor defect. The legends for each color-coded profile are provided in the inset.
Evolution of (a) the temperature, (b) electronic densities, and (c) absorbed power density as a function of the radius at 500 ps delay. The legend of each color-coded profile is the same as in Fig. 2.
Temperature (in K, logarithmic scale from 300 K to 2000 K) as a function of space and time.
Decimal logarithm of the density of conduction electrons (in ) as a function of space and time.
Evolution of the position of the absorbing front as a function of time (black curve). It is defined such that , thus leading to a significant absorption. The red curve is a fit of the latter curve with the function where is the fitting parameter whose optimized value is .
Evolution of the average velocity of the absorbing front as a function of the laser intensity.
Transient images of two forming damage sites at two different delays at (a) −1.81 ns and (b) −1.27 ns illustrating the expansion of the modified region during the energy deposition phase. Image (c) shows the final (static) morphology of the damage sites. The image dimensions are .
The parallel and cross-polarized components of a transient image captured at −1.73 ns delay illustrating the onset of the damage initiation in bulk KDP. The image dimensions are .
Transient microscopic images () during laser damage initiation with a focused beam in the bulk of fused silica showing the parallel (I) and orthogonal (II) image components at delays (a) −2.20 ns, (b) −1.59 ns, and (c) 0.30 ns. The delays are measured between the peak intensities of the pump and probe pulses.
Value of the parameters.
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