Design of a Miniaturized Dielectric Nanoantenna and Synthesis of a Two-Dimensional Nanophotonic Array Based on Particle Swarm Optimization

Abstract

We propose a miniaturized dielectric nanoantenna based on the CMOS compatible silicon-on-insulator (SOI) technology and synthesize a two-dimensional nanophotonic array using PSO algorithm. The size of the dielectric grating element antenna working at an infrared wavelength of 1550 nm is ${2.73} {\mu} \text{m} {\times 0.93\mu} \text{m}({1.76\lambda\times 0.6\lambda})$, which is the smallest size to date. The two-dimensional nanophotonic array is demonstrated with an aperture size of ${74.4\mu} \text{m}{\times 74.4\mu} \text{m}{(48\lambda\times 48\lambda)}$, achieving a sidelobe level of −15 dB. The most highlight is that it can avoid the appearance of grating lobes with a minimum element spacing limit of ${1.8\lambda}$,