Experimental Realization of Acoustic Bianisotropic Gratings

• DOI: 10.1103/physrevapplied.11.061002
• Publication Date: 2019-06-06T11:47:33Z
• Authors: Steven R. Craig; Xiaoshi Su; Andrew Norris; Chengzhi Shi
• Keywords: Realization (probability); Reflection

Bianisotropic gratings offer superior control of airborne sound via asymmetric wave transmission and reflection at an arbitrarily designed angle, leading to better technology in acoustic lensing, noise control, high-intensity focused ultrasound therapies. Traditional bianisotropic materials depend on the resonance deeply subwavelength particles, with intrinsic loss that limits grating efficiency. This study designs elements using a finite-element method maximize scattering efficiency, spatial Fourier analysis for verification. The result is systematic process designing 100% efficiency arbitrary angle.