Leaky interface waves optical detection at solid-solid interface

摘要

The experimental investigation on transparent solid/solid (Aluminum and Plexiglas) interface leaky waves generated by a pulse laser and detected with a photo elastic effect technique is reported. Three waves Lateral wave, Leaky Rayleigh (LR) wave and Leaky Interface wave (IW) are detected successfully; The velocity of the detected interface wave is in good agreement with theoretical calculation and the attenuation characteristic of the two Leaky waves is also in accordance with the theoretical prediction. The Leaky waves propagate along the 'weak bonding' interface is also measured, it was found with the continue Epoxy solidifying, the wave amplitude gradually decrease and the two Leaky waves are more difficult to distinguish. The successful measurement should improve the scientific and technological potential for the research of solid/solid interface waves.