Fig. 1. Scheme of Archimedean spiral grating

Fig. 2. Scheme of the model in numerical simulation

Fig. 3. Numerical pressure and phase distribution of output wave for different incident wave at the frequency$f=\mathrm{1}\mathrm{M}\mathrm{H}\mathrm{z}$

Fig. 4. Numerical pressure and phase distribution of output wave for incident n-th order Bessel beam at the frequency$f=\mathrm{1}\mathrm{M}\mathrm{H}\mathrm{z}$

Fig. 5. Numerical pressure and phase distribution of output wave for different incident wave at the frequency $f=\mathrm{2}\mathrm{M}\mathrm{H}\mathrm{z}$

Fig. 6. Numerical pressure and phase distribution of output wave for incident plane wave which travel through the hollow spiral grating with $a=\mathrm{3}\mathrm{m}\mathrm{m}$ at the frequency $f=\mathrm{1}\mathrm{M}\mathrm{H}\mathrm{z}$