An acoustic Maxwell’s fish-eye lens based on gradient-index metamaterials

Yuan Bao-guo^{1, 2}, Tian Ye¹, Cheng Ying^{1, 3, †,}, Liu Xiao-jun^{1, 3, ‡,}

Illustration on how AMFE lens works in geometric acoustics, where the black point is the source while the yellow one is the image. The arrows represent the direction of the wave propagation. R is the radius of the AMFE lens, and r is the distance from the observing point to the lens center.