Experimental study demonstrates broadband terahertz beam steering using a silicon-on-glass metasurface, indicating viable low-loss hardware for 6G wireless networks.
Key Points
To design, fabricate, and experimentally validate an all-dielectric silicon-on-glass reflective metasurface for broadband terahertz beam steering in 6G systems.
Engineered a 2D array of high-aspect-ratio silicon pillars on a glass substrate utilizing Mie resonances to achieve 0–2π reflection phase coverage near 0.5 THz.
Applied phase-mask synthesis to configure single-, dual-, and five-beam steering functionalities.
Fabricated prototype metasurfaces and evaluated performance using a free-space terahertz experimental link.
Achieved full 0 to 2π reflection-phase control near 0.5 THz by optimizing unit-cell geometry and substrate thickness.
Confirmed free-space beam deflection accuracies within 1.5° across single-, dual-, and five-beam steering modes.
Maintained inter-beam amplitude variations below 3 dB with close agreement between experimental and simulated responses.