Figure 1.

A schematic view of the designed metalens focusing circular polarized incident light at focal point F (a), and its MgO building block on glass substrate with height H, length L, width W, and unit cell has the dimensions $P\times P$ (b). (c) The unit cell of a simple metalens, rotated by an angle $\theta$ to impart required phase according to geometric P–B phase method. (d) Unit cell of a hybrid metalens, where two different colored nanoblocks are rotated by an angle ${\theta }_R$, ${\theta }_L$ simultaneously to focus RCP and LCP incident lights. (e,f) Top view of the simple, and hybrid metalens of radius R.