Ablation of CdTe with 100μs pulses from Nd:YAG laser: Velocity distribution of emitted particles

Ablation of 2-6 Compounds with Low Power Pulses of YAG:Nd Laser

“…The Mach numbers for the ZnTe PP target are high, and those for the CdSe are smaller. The peculiarities of the velocity distributions observed in our experiments and their comparison with the data published for materials other than the 2-6 compounds (Rzeszutek et al, 2008b) show that the stream behaviour is governed by a number of ablation parameters. Unfortunately, our results cannot be compared with results obtained by other researchers for 2-6 compounds, because publications on such data practically do not exist.…”

“…4.1. In an earlier paper (Rzeszutek et al, 2008b) it was shown that the described in Sec. 2.2 equipment for TOF measurements fulfils the conditions.…”

“…They are carried out with the use of the quadrupole mass spectrometer equipped with a pulse ion counter (PIC) as an ion detector. Here, the option of the measurements of the delay times between the electric pulse triggering the laser shot and the detection of the ionized particles by the ion detector is exploited for the determination of the particle delay time distribution (Rzeszutek et al, 2008b). From that, the velocity distribution of particles in the vapour stream is determined.…”

“…The film thickness is measured with an interference optical microscope. This measurement procedure is described in more detail in (Rzeszutek et al, 2008b). Having determined the distribution of the film thickness along the radius, the dependence of the film thickness on the polar angle θ can be obtained.…”

Analytical formula for interpretation of time-of-flight distributions for neutral particles under pulsed laser evaporation in vacuum

“…It is worth noting that formulas (1) and (A.5) presume that T 0 is the surface temperature. If we consider T 0 as the plume temperature in the initial stage of expansion, then f X (u) = f (u), and the formulas are modified as For example, such a presentation is used in [20,61]. However, for such a consideration it is difficult to unambiguously identify the initial plume temperature T 0 , and therefore we prefer to use the first approach, where T 0 is the surface temperature.…”