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(a) Sample structure. The adjacent materials (PDMS, parylene, or polyimide) coated a thin metal film (Cr, Ti), deposited on a fused quartz substrate. (b) Schematic diagram of the experimental setup. A Nd:YAG laser was applied uniformly to the sample using a homogenizer, and the laser-induced acoustic wave was measured by a hydrophone.
Transient voltage signal of the laser-induced acoustic wave, as measured by the hydrophone. The adjacent materials used were: (a) PDMS on Cr, (b) parylene on Cr, (c) polyimide on Cr, and (d) parylene on Ti.
Peak voltage of the samples studied here as a function of the laser fluence.
The spatial profile of the peak pressure in the parylene coated Cr sample, as measured by the hydrophone using the motorized stage.
Physical properties of the adjacent materials used in this study.
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