Fig. 3: Programmable terahertz (THz) single beamforming.
From: Photonic terahertz phased array via selective excitation of nonlinear Pancharatnam-Berry elements
a Schematic of the photonic THz phased array (PTPA) functionality on single beamforming. b, d Digital Micromirror Device (DMD) coding patterns to achieve two different linear phase gradients along the x directions, which are denoted as case 1 and case 2. c, e Equivalent phase distributions induced by the DMD coding patterns in b, d. f, g Calculated and measured angle-resolved intensity distributions of the generated left-handed circularly polarized (LCP) THz waves at 1.0, 1.2, and 1.4 THz for case 1 and case 2, respectively. h, i Calculated and measured intensity spectra of the generated LCP THz waves at −25°, −20°, and −15° for case 1 and case 2, respectively. The dashed lines are theoretical deflection angle and frequency results using generalized Snell’s law.
