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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

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Terahertz Metamaterial with Multiple Resonances for Biosensing Application.

Huiliang Ou¹, Fangyuan Lu¹, Zefeng Xu¹

¹State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou 510275, China.

Nanomaterials (Basel, Switzerland)

|June 4, 2020

Summary

A novel sickle-shaped metamaterial (SSM) biochemical sensor demonstrates high sensitivity in the terahertz range. This metamaterial sensor shows promise for advanced biochemical sensing applications.

Keywords:

biochemical sensing environment sensor metamaterial multiple resonances

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Area of Science:

Metamaterials
Terahertz Spectroscopy
Biochemical Sensing

Background:

Metamaterials offer unique electromagnetic properties for sensing applications.
Terahertz frequency range provides non-ionizing and label-free detection capabilities.
Biochemical sensors are crucial for diagnostics and research.

Purpose of the Study:

To investigate a sickle-shaped metamaterial (SSM) based biochemical sensor.
To analyze its performance in the terahertz frequency range.
To evaluate its potential for biochemical sensing applications.

Main Methods:

Simulated electromagnetic responses of SSM to terahertz waves.
Investigated four plasmon resonances: dipolar, quadrupolar, octupolar, and hexadecapolar.
Evaluated sensing performance by varying ambient environments, analyte types, and device configurations (hemispheres, microfluidic chips).

Main Results:

Identified four distinct plasmon resonances in the SSM.
Achieved high sensitivity (471 GHz/RIU) and Figure of Merit (FOM) (94 RIU⁻¹) with analyte thin-films.
Demonstrated enhanced sensing with dielectric hemispheres and microfluidic chips, reaching up to 502 GHz/RIU in realistic models.

Conclusions:

The SSM exhibits excellent sensing capabilities in the terahertz range.
Device design modifications, such as microfluidic integration, significantly enhance sensitivity.
The proposed SSM sensor shows considerable potential for diverse biochemical sensing applications.