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Updated: May 27, 2026

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

Published on: August 30, 2012

Terahertz polarization-sensitive rectangular pipe waveguides.

Jen-Tang Lu¹, Chih-Hsien Lai, Tzu-Fang Tseng

¹Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, 10617, Taiwan.

|November 24, 2011

Summary

This summary is machine-generated.

We developed square and rectangular pipe waveguides for efficient terahertz (THz) waveguiding. These novel structures control THz wave polarization, overcoming limitations of traditional circular designs.

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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

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Area of Science:

Optics and Photonics
Terahertz (THz) Technology
Waveguide Design

Background:

Terahertz (THz) waveguiding commonly uses circular-symmetric fibers and waveguides.
Existing THz waveguides often exhibit transmission degeneracy for orthogonal polarizations.
Controlling THz wave polarization is crucial for various applications.

Purpose of the Study:

To propose and investigate square and rectangular pipe waveguides for low-loss THz waveguiding.
To demonstrate the ability of these waveguides to control THz wave polarization.
To analyze the polarization sensitivity and its dependence on waveguide structure.

Main Methods:

Fabrication and characterization of square and rectangular pipe waveguides.
Measurement of attenuation spectra to assess waveguiding loss.
Analysis of polarization sensitivity through transmission measurements.
Investigation of butt coupling for integrating different waveguide types.

Main Results:

The proposed rectangular pipe waveguides effectively remove transmission degeneracy for orthogonal polarizations.
These waveguides exhibit polarization sensitivity to guided THz waves.
Polarization sensitivity is found to be dependent on the specific structure of the pipe waveguides.
Successful combination of circular and rectangular pipe waveguides using a butt coupling method.

Conclusions:

Square and rectangular pipe waveguides offer a promising solution for low-loss THz waveguiding with polarization control.
The polarization sensitivity of these waveguides can be tailored by structural design.
The proposed structures provide an alternative to conventional circular THz waveguides, enabling advanced THz applications.