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

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 μ m ×0.93μ m(1.76λ×0.6λ), which is the smallest size to date. The two-dimensional nanophotonic array is demonstrated with an aperture size of 74.4μ m×74.4μ m(48λ×48λ), 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 1.8λ.