Subpicosecond laser ablation of copper and fused silica: Initiation threshold and plasma expansion

Complex processing of interferograms of light-erosion gas-plasma streams in vacuum

“…The obtained results (n e 1 0 18 -10 19 cm -3 ) are in good agreement with the results of emission spectroscopy [15]. The electron concen tration was used as the proportionality factor when constructing the distribution of a particle from the velocities in the GPF and their average mass velocity.…”

“…The thus obtained results reflect the distribution of the thermodynamic (Boltzmann) temperature T ~ Т е ~ Т i ( 20-40) × 10 3 K (Fig. 6) and correspond to the data that were found using the emission spectroscopy methods [15,16]. We assume that the distribution of atoms and ions in a gas dynamic flow is proportional to the electron distribution, and particles are accelerated within a rel atively short period of time and continue their move ment in vacuum with a constant velocity.…”

“…This approach to the arrange ment of an experiment and complex processing of its results is applied for the first time. The results agree well with the available reference data that were obtained using other methods under similar experimental condi tions [15,16] or by numerical simulation [17].…”

Thermal behavior of thin metal films irradiated by shaped femtosecond pulse sequences laser

“…As shown in Fig. 2, seen from this figure, the ablation depth has a reasonably good agreement between the numerical procedure and the experiment [27] for the laser fluence of 0-2500 mJ/cm 2 . Therefore, we are convinced that this numerical simulation method is credible.…”

Functional multilayered capacitor pixels printed by picosecond laser-induced forward transfer using a smart beam shaping technique

“…The irradiated area on the donor layer is made with a combination of beams from masks 1 and 2, as it will further be shown. Both masks were produced by laser micromachining [23] of titanium foil (25 μm thickness, 99.6% purity, supplied by GoodFellow Inc.) in a vacuum chamber (7 · 10 -5 mbar), by using an achromatic lens (700-1100 nm spectral range, 50 mm focal length) and a femtosecond pulsed laser (Spectraphysics, model "Hurricane", 800 nm wavelength, 100 femtosecond pulse duration, 1 mJ/pulse @ 1 kHz repetition rate) [24][25][26][27][28][29][30]. The scan/drill speed was set at ~10 μm/s, with automatic computer control of the positioning system; the size of the resulting masks is 2 x 2 mm 2 .…”