Ya-Ping Zhang

Ultra-thin resonant Fresnel metalens for achromatic high-gain acoustic focusing

The classical Soret-type acoustic Fresnel zone plate suffers from two major drawbacks: severe chromatic aberration and low energy efficiency. This work proposes a Subwavelength High-gain Achromatic Resonant Plate with a thickness of only 0.43λ0: straight/coiled-up units achieve π phase complementarity and near-total tr...