| Abstract: | Propagation of stress waves into polymer substrates undergoing UV laser ablation has been studied by means of laser Doppler vibrometry technique. The measurements acquired far from the ablation point demonstrate oscillations of high amplitude and low decay. For all the studied samples, realized in polystyrene and polymethylmethacrylate of two different molecular weights, ablation generates mechanical excitation of the structure, which propagates all over the bulk as vibrational modes and stress waves. |
