Robust terahertz on-chip topological pathway with single-mode and linear dispersion

Area of Science:

• Physics
• Electrical Engineering
• Materials Science

Background:

• Terahertz (THz) on-chip pathways are vital for next-generation wireless communication, integrated circuits, and high-speed chip interconnections.
• Current THz pathway development faces significant hurdles, including channel crosstalk and disordered scattering, limiting performance and reliability.

Purpose of the Study:

• To propose and experimentally demonstrate a novel terahertz on-chip topological pathway.
• To address limitations in THz signal transmission caused by structural imperfections and interference.

Main Methods:

• Constructed a subwavelength structure integrating topological properties (broadband single-mode transmission, linear dispersion) with periodic metal structures for field localization.
• Employed metal microstructures to incorporate topological protection into radio frequency circuits.

Main Results:

• The demonstrated pathway exhibits exceptional transmission robustness, remaining unaffected by structural curvature.
• Efficient terahertz wave transmission was maintained even with scattering or structural defects.
• Minimized signal interference, showcasing the effectiveness of topological protection.

Conclusions:

• The proposed terahertz on-chip topological pathway offers a robust solution for reliable signal transmission.
• This technology has significant potential for advancing radio frequency device transmission and chip interconnection in the terahertz range.