Figure 4
From: Broadband acoustic subwavelength imaging by rapidly modulated stratified media
(a) Acoustic intensity distribution of two subwavelength sources propagating in air. Acoustic intensity distribution of two subwavelength sources for (b) lossless lens and (c) lossy lens. The lens has a thickness \(L=0.75{\lambda }_{0}\). The thicknesses of the air layers in the two sides of the lens are both set as 0.5\({\lambda }_{0}\). The dashed lines indicate the interfaces between air and lens.
