Advances in All-Silicon Waveguides for Terahertz Integration

TL;DR

This paper reviews recent advances in all-silicon terahertz waveguides, emphasizing their potential for high-speed chip-to-chip communication, broad bandwidth, and integration in terahertz systems.

Contribution

It provides a comprehensive overview of different all-silicon terahertz waveguide types and recent progress in device implementation for high-speed, large-scale terahertz integration.

Findings

All-silicon waveguides enable high-speed terahertz communication.

Recent progress includes development of passive functional devices.

These waveguides support broad bandwidth and low-loss operation.

Abstract

In chip-to-chip communication, terahertz waves provide a promising approach to achieve high data capacity with improved energy efficiency, effectively bridging the gap between electrical and optical domains. By realizing this potential, all-dielectric waveguides have emerged as high-speed interconnects, offering broad bandwidth and low-loss characteristics while being compatible with planar integration. This paper reviews different types of terahertz all-dielectric waveguides, including photonic-crystal and effective-medium-clad structures, and highlights recent progress in implementing these platforms to develop various passive functional devices, paving the way for high-speed operation and large-scale integration in terahertz systems.