Terahertz OAM-Airy beam generator
Year: 2025
Type: article
Abstract: Vortex beams carrying orbital angular momentum (OAM) can significantly enhance spectral efficiency and anti-interference capabilities, demonstrating promising applications in future 6G high-capacity wireless communications. However, scattering during OAM beam propagation reduces transmission efficiency. Airy beams offer advantageous properties, including non-diffraction, self-focusing, and self-healing characteristics during propagation. By combining these features of Airy beams with OAM beams, scattering issues in electromagnetic wave transmission can be effectively mitigated. In this article, we employ the OAM-Airy phase superposition principle to design a five-layer transmissive metasurface operating at 1 THz with dimensions of 10λ 0 ×10λ 0 , enabling simulation verification of terahertz non-diffracting OAM-Airy beams. Simulation results confirm successful generation of OAM-Airy beams with topological charge l = 1 across the 0.8-1.3 THz frequency band, achieving non-diffracting propagation distances exceeding 6300 µm (21λ 0 ). The OAM-Airy beam achieves focus at 4200 µm (14.3λ 0 ).
Source: Optical Materials Express
DOI: 10.1364/ome.575875
Authors: Jiu-sheng Li, Cheng-Ao Wu
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,843
OpenAlex ID: W4414948259