Self collimation of ultrasound in a three-dimensional sonic crystal

Soliveres, Ester; Espinosa, Víctor; Pérez-Arjona, Isabel; Sánchez-Morcillo, Víctor J.; Staliunas, Kestutis
April 2009
Applied Physics Letters;4/20/2009, Vol. 94 Issue 16, p164101
Academic Journal
We present the experimental demonstration of self-collimation (subdiffractive propagation) of an ultrasonic beam inside a three-dimensional (3D) sonic crystal. The crystal is formed by two crossed steel cylinders structures in a woodpilelike geometry disposed in water. Measurements of the 3D field distribution show that a narrow beam, which diffractively spreads in the absence of the sonic crystal, is strongly collimated in propagation inside the crystal, demonstrating the 3D self-collimation effect.


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