基于介质超表面的双波段偏振无关吸收器，用于可见光环境下的传感应用

IF 2.6 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Physica Scripta Pub Date : 2024-09-10 DOI:10.1088/1402-4896/ad75c7

Hemn Younesiraad, Hadi Sharifi, Reza Masoumi and Mohammad Bemani

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引用次数: 0

摘要

我们提出了一种双波段、与极化无关的介质太赫兹吸收器，它在 f1 = 419 太赫兹和 f2 = 528 太赫兹频率下表现出近乎完美的吸收和最小的反射。我们利用电磁理论对该结构进行建模，推导出元表面的表面电导纳和磁阻抗，并从反向电极化率和磁极化率的角度阐明了完美吸收所需的条件。该吸收器采用可调对称设计，便于通过修改结构参数进行精确频率调整，并确保垂直入射电磁波的极化无关性。这种可扩展的多功能吸收器由现成材料制成，因其简便、成本效益高和性能优越，非常适合应用于资源探测、成像、传感和医疗诊断。

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A dual-band polarization independent dielectric metasurface-based absorber for sensing application in the visible light regime

We present a dual-band, polarization-independent dielectric terahertz absorber exhibiting near-perfect absorption and minimal reflection at frequencies of f1 = 419 THz and f2 = 528 THz. Using electromagnetic theory, we modeled the structure to derive the surface electric admittance and magnetic impedance of the metasurface, elucidating the conditions required for perfect absorption in terms of inverse electric and magnetic polarizabilities. The absorber features a tunable symmetrical design, facilitating precise frequency adjustment by modifying structural parameters and ensuring polarization independence for perpendicularly incident electromagnetic waves. This scalable and versatile absorber, constructed from readily available materials, is optimally suited for applications in resource detection, imaging, sensing, and medical diagnostics, attributed to its simplicity, cost-effectiveness, and high performance.

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来源期刊

Physica Scripta 物理-物理：综合

CiteScore

3.70

自引率

3.40%

发文量

782

审稿时长

4.5 months

期刊介绍： Physica Scripta is an international journal for original research in any branch of experimental and theoretical physics. Articles will be considered in any of the following topics, and interdisciplinary topics involving physics are also welcomed: -Atomic, molecular and optical physics- Plasma physics- Condensed matter physics- Mathematical physics- Astrophysics- High energy physics- Nuclear physics- Nonlinear physics. The journal aims to increase the visibility and accessibility of research to the wider physical sciences community. Articles on topics of broad interest are encouraged and submissions in more specialist fields should endeavour to include reference to the wider context of their research in the introduction.