An undergraduate experiment demonstrating the physics of metamaterials with acoustic waves and soda cans

作者：Wilkinson James T^*; Whitehouse Christopher B; Oulton Rupert F; Gennaro Sylvain D

来源：American Journal of Physics, 2016, 84(1): 14-20.

DOI：10.1119/1.4934596

We describe a novel undergraduate research project that highlights the physics of metamaterials with acoustic waves and soda cans. We confirm the Helmholtz resonance nature of a single can by measuring its amplitude and phase response to a sound wave. Arranging multiple cans in arrays smaller than the wavelength, we then design an antenna that redirects sound into a preferred direction. The antenna can be thought of as a new resonator, composed of artificially engineered meta-atoms, similar to a metamaterial. These experiments are illustrative, tactile, and open ended so as to enable students to explore the physics of matter/wave interaction.

• 出版日期2016-1