Surface-grating antennas for optical phased arrays usually show a strongly polarization-dependent emission angle and efficiency. Exploiting a subwavelength metamaterial on silicon-on-insulator, we demonstrate a compact 6.4 µm × 2.9 µm micro antenna that emits at the same 10° angle for both TE and TM polarizations, with an estimated efficiency of −4 dB and a polarization-dependent efficiency difference below 1 dB over 31 nm.
Read the paper: Scientific Reports 15, 13276 (2025), doi: 10.1038/s41598-025-97833-3
Figure reproduced from S. Salhi et al., Scientific Reports 15, 13276 (2025), under a CC BY 4.0 license.