(a) Picture of fabricated PB metasurefaces formed by ABA meta-atoms. Measured scattered-field intensities in the (b),(c) transmission and (e)(f) reflection sides as function of frequency and the detecting angle for the PB metasurface illuminated by normally incident LP wave. (d) Absolute efficiencies of the four modes versus frequency for the PB metasurface obtained through analyzing experimental data in (b),(c),(e),(f). Blue starts represent the results calculated based on the generalized Snell’s law. All figures reproduced with permission from [24] © 2017, AIP.