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Related Experiment Video

Updated: Feb 10, 2026

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

Published on: August 30, 2012

Lattice Slot Waveguide for Terahertz Microfluidics Biomedical Trace Analysis.

Shui Liu^1,2, Qi Xie¹, Yongye Xia¹

¹College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing, China.

Advanced Materials (Deerfield Beach, Fla.)

|February 9, 2026

Summary

This study introduces a novel metasurface microfluidic chip for sensitive terahertz analysis of biomedical samples. The design enhances detection sensitivity and accuracy by minimizing signal loss and enabling simultaneous multi-polarization measurements.

Keywords:

biosensors lattice resonance metasurface microfluidics terahertz spectroscopy

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Last Updated: Feb 10, 2026

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

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Published on: August 30, 2012

$Fabrication of Refractive-index-matched Devices for Biomedical Microfluidics$

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Published on: September 10, 2018

Fabrication of Zero Mode Waveguides for High Concentration Single Molecule Microscopy

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Published on: May 12, 2020

Area of Science:

Terahertz (THz) spectroscopy
Metasurface technology
Microfluidics

Background:

Conventional metasurface resonators have limited sensitivity and Q-factor due to radiative leakage.
Water absorption noise complicates terahertz trace analysis of biomedical samples.
Existing platforms struggle with real-time, label-free analysis of volume-limited samples.

Purpose of the Study:

To develop a highly sensitive, real-time, label-free terahertz analysis platform for biomedical samples.
To overcome the limitations of conventional metasurface resonators by mitigating radiative loss.
To achieve enhanced sensitivity and Q-factor through a novel waveguide design.

Main Methods:

Design of a metal-insulator-metal (MIM) slot waveguide metasurface to confine terahertz energy.
Synergistic excitation of surface lattice resonance and guided mode resonance.
Development of an anisotropic detection strategy with a patterned lattice structure for polarization multiplexing.

Main Results:

Achieved a significantly enhanced Q-factor and sensitivity by confining energy within the microfluidic channel.
Demonstrated simultaneous polarization multiplexed responses with a figure of merit of 135.
Experimental validation showed a limit of detection of 625 pmol mL⁻¹ and a Q-factor of 189.

Conclusions:

The proposed metasurface microfluidic platform offers a unique approach for enhanced terahertz biomedical trace analysis.
The design effectively suppresses water absorption noise and mitigates radiative loss.
Multidimensional sensing capabilities provide a pathway for increased accuracy and efficiency in analyzing limited biological samples.