Fig. 3
Non-planar metasurface beam deflectors. Results of numerical simulation showing the magnetic field intensity distribution of the beam deflector design, according to the generalised Snell laws, to refract light to an angle of π/6 rad. In the calculations, the incident light is a TM polarised plane wave propagating along the y-direction. a and b Grey intensity distributions of planar and sinusoidal beam deflector. Blue dashed lines indicate the position and geometry of the interfaces. c Transmission efficiency of the sinusoidal metasurface in b as a function of the incident angle. d Transmission efficiency of a conventional sinusoidal grating for comparison to c
