In this work we propose a solution for the creation of a nanojet focusing component based on a combination of two dielectric materials capable of managing the position of the focused beam in the near zone. We demonstrate that the double-material design of the elements of metagratings can be used to change its diffraction properties improving the diffraction efficiency and diffraction uniformity.
“High-uniformity, high-performance double material dielectric diffractive metagratings.“, O. Shramkova, V. Drazic, L. Blondé, B. Varghese, V. Allié, 14th International Congress on Artificial Materials for Novel Wave Phenomena – Metamaterial 2020, New-York, USA.