Practical Metal-Wire THz Waveguides

TL;DR

This paper presents practical designs for THz metal-wire waveguides that combine low loss, ease of manufacturing, and flexible configurations, supported by experimental and numerical analysis confirming TEM-mode guidance across a broad spectrum.

Contribution

It introduces practical THz wire waveguide implementations with comprehensive experimental and numerical validation, enhancing their applicability and performance.

Findings

Confirmed TEM-mode guidance in broad spectral range

Demonstrated low-loss and flexible waveguide configurations

Validated optical properties through THz-TDS spectroscopy and finite element simulations

Abstract

Several practical implementations of the THz wire waveguides are proposed combining the low-loss, low group velocity dispersion and simplicity of excitation of the two-wire metal waveguide with the ease of manufacturing, possibility of bending and a convenient access to a modal power of the hollow core waveguide. Optical properties of the wire waveguides are investigated experimentally by THz-TDS spectroscopy and numerically using the finite element method confirming TEM-mode guidance in a broad spectral range.