Research on high sensing performance and multi-band terahertz tunable perfect absorption device

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-07-21 DOI:10.1039/D5DT00947B

Chenyu Gong, Mengsi Liu, Shubo Cheng and Zao Yi

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Abstract

In this paper, a multi-band terahertz tunable perfect absorption device with high detection performance is proposed. The device has a simple structure, consisting of AlCuFe microstructure, SiO₂ dielectric layer and Au substrate, and has seven resonance peaks (M₁–M₇) with high absorption rate, with an average absorption rate of 98.4%. Because of its axisymmetric design, it has polarization-independent characteristics. Perfect absorption is confirmed by impedance matching with free space. The device offers exceptional tunability by adjusting the shape, Fermi level of the AlCuFe quasicrystal, and structural parameters. The high absorption performance arises from the synergistic effects of Cavity Resonance (CR), Guided Mode Resonance (GMR), and Localized Surface Plasmon Resonance (LSPR). It also exhibits remarkable detection performance, with a maximum refractive index sensitivity of 3704 GHz RIU⁻¹, a Q-factor of 315.59, and an FOM of 66.59 RIU⁻¹. These attributes underscore its potential in biomedical sensing, communication, and optoelectronic applications.

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高传感性能多波段太赫兹可调谐完美吸收器件的研究

本文提出了一种具有高探测性能的多波段太赫兹可调谐完美吸收器件。该器件结构简单，由AlCuFe微结构、SiO2介电层和Au衬底组成，具有7个共振峰（M1-M7），吸收率高，平均吸收率为98.4%。由于其轴对称设计，它具有与极化无关的特性。通过阻抗与自由空间的匹配证实了完全吸收。该器件通过调整AlCuFe准晶体的形状、费米能级和结构参数提供了卓越的可调性。高吸收性能源于腔共振（CR）、导模共振（GMR）和局域表面等离子体共振（LSPR）的协同作用。它的最大折射率灵敏度为3704 GHz/RIU， Q-factor为315.59，FOM为66.59 RIU⁻¹。这些特性强调了其在生物医学传感、通信和光电子应用方面的潜力。

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.