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. 2017 Feb 27;8:14608. doi: 10.1038/ncomms14608

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Copyright © 2017, The Author(s)

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(a–c) Transmitted pressure field maps (real-valued) over a blazed grating with variable line widths, d=17λ₀/15, 22λ₀/15 and 27λ₀/15, respectively. The sketch above the maps shows the phase profile over 2λ₀. (d) Far-field pressure field map for line widths d varying between λ₀ and 2λ₀. Theoretical (continuous lines) and experimental (symbols) transmitted angles θ_t are compared with the numerical simulation. Colour bars represent normalized pressures.