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Parameter Multiplexing-Based Terahertz Enhanced Absorption Spectra Using Ultrathin Metal Groove Array

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Abstract

Due to the unique fingerprint spectra of many bio-molecules in the terahertz range, their detection in this frequency band has gained widespread attention. However, in practical applications, there are still many difficulties in effectively measuring the spectra of trace analyte samples. This study demonstrates the enhancement of terahertz absorption spectra in bio-molecular materials by utilizing a metal groove array in geometry parameters multiplexing and the relationship between the enhancement characteristics and the thickness of the sample as well as the number of structural grooves. The results indicate that the absorption enhancement factor for a 0.1-μm-thick lactose sample is approximately 120 times. This design offers a better method for detecting bio-molecular materials.

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No datasets were generated or analyzed during the current study.

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Funding

This work was supported in part by National Key R&D Program of China (2021YFF0600300), Basic Public Wel-fare Research Project of Zhejiang Province (LTGN23C180003), and National Natural Science Foundation of China (62175223).

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Authors and Affiliations

  1. Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province, College of Information Engineering, China Jiliang University, Hangzhou, 310018, Zhejiang, China

    Jiaxin Zhu, Xiangjun Li, Dexian Yan & Le Zhang

Authors
  1. Jiaxin Zhu
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  2. Xiangjun Li
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  3. Dexian Yan
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  4. Le Zhang
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Contributions

X. J. Li and D. X. Yan wrote the main manuscript text; J. X. Zhu simulated the numerical simulations. L. Zhang polished the paper. All authors reviewed the manuscript.

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Correspondence to Xiangjun Li or Dexian Yan.

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Zhu, J., Li, X., Yan, D. et al. Parameter Multiplexing-Based Terahertz Enhanced Absorption Spectra Using Ultrathin Metal Groove Array. Plasmonics (2024). https://doi.org/10.1007/s11468-024-02250-3

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