Phononic crystal diffraction gratings
作者： Rayisa P. Moiseyenko , Sarah Herbison , Nico F. Declercq , Vincent Laude
DOI: 10.1063/1.3682113
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摘要: When a phononic crystal is interrogated by an external source of acoustic waves, there necessarily phenomenon diffraction occurring on the enclosing surfaces. Indeed, these surfaces are periodic and resulting grating has periodicity that depends orientation crystal. This work presents combined experimental theoretical study bulk ultrasonic waves 2D consists triangular lattice steel rods in water matrix. The results transmission experiments compared with band structures obtained finite-element method. Angular spectrograms (showing frequency as function angle) determined from then simulations show occurs its highly frequency-d...
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