Sensitive Detection of Trace Pesticide Residue Implemented by Terahertz All-Dielectric Metamaterial

A novel all-dielectric terahertz metamaterial is proposed, which has a broadband absorbance spectrum comprising two resonance peaks. The experiment results indicate that the designed metamaterial has great application potential as a benomyl sensor. Also, the regression analysis demonstrated the great linear correlation between the absorbance intensity and the concentration of benomyl. The correlation coefficient reaches 0.9954 and sensitivity of 0.0017 ppm
^-1
. These results indicate that the all-dielectric terahertz metamaterials can be used in the highly sensitive and stable detection of trace pesticide residues, unlocking a host of feasibility for future applications in the fields of biosensing and substances detection.