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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

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Terahertz metasurface sensor based on patterned metal slit structure for trace detection.

Xin Yan¹, ShiWu Ma², YongGang Zhang²

¹School of Opto-electronic Engineering, Zaozhuang University, Zaozhuang 277160, China.

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy

|January 1, 2026

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This summary is machine-generated.

A novel terahertz metasurface sensor offers highly sensitive, non-destructive trace detection for food safety. This innovative sensor achieves specific recognition of substances like potassium sorbate and L-arginine using terahertz fingerprint spectra.

Area of Science:

Terahertz (THz) spectroscopy and sensing
Metamaterial and metasurface applications
Food safety and chemical analysis

Background:

Trace detection is crucial for food safety and substance identification.
Existing methods may lack sensitivity or specificity for certain contaminants.
Terahertz spectroscopy offers unique advantages for non-destructive analysis.

Purpose of the Study:

To propose and demonstrate a novel terahertz metasurface sensor for trace detection.
To achieve highly sensitive and specific identification of chemical substances.
To explore applications in food safety and pharmaceutical analysis.

Main Methods:

Design and fabrication of a terahertz metasurface sensor utilizing a patterned metal slit structure.

Keywords:

Fingerprint spectra Metasurface sensor Terahertz Trace detection

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Utilizing two distinct transmission modes for sample analysis.

Experimental validation of potassium sorbate detection.

Simulations to demonstrate L-arginine recognition via electromagnetically induced transparency (EIT).

Main Results:

The sensor achieved highly sensitive and non-destructive trace detection of potassium sorbate in both transmission modes.
Simulations showed the metasurface sensor can induce an EIT effect for L-arginine at 0.99 THz.
Specific, non-destructive recognition of L-arginine was demonstrated through its terahertz fingerprint spectrum.

Conclusions:

The developed terahertz metasurface sensor provides a novel strategy for sensitive and specific trace detection.
This technology contributes to advancements in qualitative and quantitative analysis for food safety, biomedicine, and pharmaceuticals.
The sensor's ability to utilize terahertz fingerprint spectra enhances substance identification capabilities.