Metacoatings for wavelength scale, high NA plano-concave focusing lenses

Mahin Naserpour, Carlos J. Zapata-Rodríguez, Carlos Díaz-Aviñó +1

We design plano-concave silicon lenses with coupled gradient-index plasmonic metacoatings for ultrawide apertured focusing utilizing a reduced region of $\sim 20{\lambda }^2$. The anomalou…