多波段石墨烯嵌套环太赫兹波吸收器与气隙敏感的医疗保健生物传感应用

IF 3 Q3 Physics and Astronomy
Seyed Mahmoud Hoseini , Hadi Dehbovid , Seyed Mehdi Abedi Pahnehkolaei , Mehdi Radmehr
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引用次数: 0

摘要

提出了一种高灵敏度的多波段太赫兹波吸收器,其特点是三层结构,中间有一个用于放置血液样本的气隙,中间夹有堆叠的石墨烯-卡普顿层,后面有一个完全反射的金属层。利用等效阻抗电路对吸收器进行了建模,并通过全波数值模拟进行了验证。该器件在1 ~ 9.5太赫兹频率范围内显示出7个不同的吸收峰,每个峰的吸收水平超过80%。灵敏度分析揭示了对几何参数变化具有最小变化的稳健吸收性能,同时对气隙内折射率变化具有高灵敏度。具体来说,当折射率变化小至0.01时,吸收光谱就会发生显著变化,这对于非侵入性生物传感应用至关重要。这些结果强调了吸收器作为医疗监测系统中精确、可穿戴和可靠的构建块的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Multi-band graphene-nested rings terahertz wave absorber with air gap for sensitive healthcare biosensing applications
A highly sensitive multi-band terahertz wave absorber is proposed, featuring a three-layer structure with a central air gap for blood sample placement, sandwiched by stacked graphene-Kapton layers and backed by a fully reflecting metallic layer. The absorber is modeled using an equivalent impedance circuit and validated by full-wave numerical simulations. The device exhibits seven distinct absorption peaks across the 1 to 9.5 THz frequency range, with absorption levels exceeding 80% for each peak. Sensitivity analysis reveals robust absorption performance with minimal variation against geometrical parameter changes, while demonstrating high sensitivity to refractive index changes within the air gap. Specifically, the absorption spectrum shifts significantly for refractive index variations as small as 0.01, which is critical for non-invasive biosensing applications. These results underscore the absorber’s potential as an accurate, wearable, and reliable building block for healthcare monitoring systems.
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来源期刊
Results in Optics
Results in Optics Physics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
2.50
自引率
0.00%
发文量
115
审稿时长
71 days
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