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用于精确汽车燃料表征的太赫兹超表面吸收器的增强结构可调性和高灵敏度。

Enhanced structural tunability and high sensitivity of a THz metasurface absorber for precise automotive fuel characterization.

作者信息

Ahmed Sazzad, Alam Touhidul, Soliman Md Mohiuddin, Moubark Asraf Mohamed, Rahman Md Mushfiqur, Islam Md Shabiul, Islam Mohammad Tariqul

机构信息

Pusat Sains Angkasa (ANGKASA), Institut Perubahan Iklim, Universiti Kebangsaan Malaysia (UKM), Bangi, 43600, Selangor, Malaysia.

Department of Computer Science and Engineering, International Islamic University Chittagong, Kumira, Chittagong, 4318, Bangladesh.

出版信息

Sci Rep. 2025 Jul 2;15(1):22996. doi: 10.1038/s41598-025-05326-0.

DOI:10.1038/s41598-025-05326-0
PMID:40596052
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12216422/
Abstract

This paper introduces a metasurface absorber (MSA) sensor designed for fuel adulteration detection in the sub-terahertz (THz) range. The MSA features mirror-symmetric separated half-circle (MSSHC)-shaped resonators, a gold ground plane, and a dielectric layer, operating effectively within the 4.4-5.4 THz frequency range. It achieves notable absorption peaks at 4.94 THz. The resonance frequencies can be finely tuned by adjusting the geometric dimensions, ensuring optimal absorption. The MSA detects various additives in diesel, gasoline, and octane by monitoring shifts in resonance frequencies corresponding to changes in the oil's refractive index (RI). The absorber demonstrates a Q-factor of 304.35, a figure of merit (FOM) of 7.15 RIU, and a maximum sensitivity of 120 GHz/RIU in diesel detection. This innovative concept holds significant potential as an efficient fuel oil sensor within the automotive industry. Its structural tunability, high sensitivity, and practical design render it a promising sensor for chemical detection and biosensing applications in the THz regime.

摘要

本文介绍了一种为太赫兹（THz）波段燃油掺假检测而设计的超表面吸收器（MSA）传感器。该MSA具有镜像对称分离半圆（MSSHC）形谐振器、金接地平面和介电层，在4.4 - 5.4 THz频率范围内有效工作。它在4.94 THz处实现了显著的吸收峰。通过调整几何尺寸可以对谐振频率进行精细调谐，以确保最佳吸收。该MSA通过监测与油的折射率（RI）变化相对应的谐振频率偏移来检测柴油、汽油和辛烷中的各种添加剂。该吸收器在柴油检测中表现出304.35的品质因数、7.15 RIU的品质因数优值（FOM）以及120 GHz/RIU的最大灵敏度。这一创新概念作为汽车行业内一种高效的燃油传感器具有巨大潜力。其结构可调性、高灵敏度和实用设计使其成为太赫兹领域化学检测和生物传感应用的一种有前景的传感器。

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