Schematic of the nanosecond-shadowgraphy setup.
Schematic of the donor sample ablated using different fluence values (from to ) for each row (inset shows the optical microscope image of an ablated region on the donor).
Shadowgraphs recorded for thick Gd–Ga–O target with 350 nm TP for fluence values of (a) 60 and (b) at delay times of 400–2400 ns between the pump and the probe. The shockwave front and the flyer have been marked as 1 and 2, respectively, as an example in (b). Also the solid chunks of the Gd–Ga–O layer from the shattered edges of its flyer are circled and marked as (a) and (b). The 3D schematic of the donor shearing process is shown in (c).
Images for the thick Yb:YAG target with 350 nm TP for fluence values of (a) 60 and (b) at delay times of 400–2400 ns between the pump and the probe.
Variation in the position of the (a) shockwave and the (b) flyer as functions of the pump fluence at different delay times for the sample with thick Yb:YAG on top of a 350 nm TP. The flyer is shown to slow down and depart from a constant velocity straight line fit for a fluence of in (b). (c) Plot showing the variation in propagation distance of shockwave as a function of delay time as predicted by the theory and that given by experimental values for thick Yb:YAG on top of a 350 nm TP with fluence of .
Variation in the propagation velocity of the (a) shockwave and the (b) flyer as functions of the pump fluence at a delay time of 800 ns for a sample with thick Gd–Ga–O donor film on top of a 350 nm TP-DRL.
(a) Plot showing the dependence of the position of the shockwave and the flyer on the donor thickness for fixed values of TP thickness (350 nm) and delay time (1600 ns) for a Gd–Ga–O sample having a maximum thickness at the center and a minimum thickness around the edges. The -axis corresponds to the position on the sample with varying thickness as shown in (b).
The propagation distance of the flyer plotted against the thickness of the donor film of Gd–Ga–O for fixed values of TP (350 nm) and delay time (1600 ns). The curve clearly shows that thicker films have slower velocities, as expected.
Shadowgraphs recorded for targets with (a) 50 and (b) 350 nm TP-DRL while keeping the donor (Yb:YAG) thickness constant at the delay times of 0–3600 ns between the pump and the probe and a fluence of .
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