Utilizing a novel configuration for side-lobes suppression of a dielectric optical nanoantenna

A novel configuration operating at 1550 nm based on silicon-on-insulator substrate is proposed for side-lobes suppression of a dielectric optical nanoantenna. The proposed configuration consists of reflection gratings which can reflect the downward light back. By using this configuration, the side-lobe level can be improved by 12.78 dB.