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. 2012 Mar 28;2:340. doi: 10.1038/srep00340

Figure 1. Sketch of the considered geometries.

Figure 1

On the left a 1-D acoustic grating of period d, slit aperture w and thickness l; on the right a 2-D acoustic grating of periods dx and dy , area of the elementary cell S1 = dxdy and area of the aperture S2. Both structures are excited by an acoustic plane-wave incident at an angle ϑ with respect to the z-axis and an angleϕ in the x-y plane.