The behaviour of laser-driven shock waves in impedance-match, multilayered targets has been explored in hydrodynamic simulations as well as experimental measurements, taking aluminum-gold as the sample target. To achieve maximum pressure enhancement in the gold layer, one needs to consider not only the aluminum layer thickness but also the thickness of the gold layer. Such optimization was demonstrated in the numerical calculations which showed good agreement with observations.
"Shock Multiplication In Multilayered Targets", Proc. SPIE 0913, High Intensity Laser-Matter Interactions, (11 July 1988); doi: 10.1117/12.965127; https://doi.org/10.1117/12.965127