Hyperbolic metamaterials for high-efficiency generation of circularly polarized Airy beams

Chen Lin^†, Li Huihui, Hao Weiming, Yin Xiang, Wang Jian

(a) The dispersion relations of l- and s-polarized fundamental SW modes for RHMM with different W_l. (b) The birefringent index between l- and s-polarized fundamental SW modes as a function of W_l at 8.6 GHz. RHMM meta-atom is made up of multilayered copper (conductivity of 5.8× 10⁷ Ω⁻¹ ⋅ m⁻¹ and thickness of t_m = 0.068 mm) and FR4 (relative permittivity of 4.3+0.025j and thickness of t_d = 0.45 mm).