High sensitivity and ultra-narrowband perfect metamaterial absorber based on graphene metasurface

IF 2.8 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

The European Physical Journal Plus Pub Date : 2025-05-20 DOI:10.1140/epjp/s13360-025-06374-1

Yingxing Zeng, Boxun Li, LiLi Zeng, Genxiang Zhong, Zhengzheng Shao, Haiqing Xu, Mingliang Liu, Zhiguo Chen, Chengjian Dai

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引用次数: 0

Abstract

In this paper, high-quality-factor, high-sensitivity dual-narrowband absorption can be achieved via Fabry–Perot resonance. Quantitative research is performed to assess the impact of monolayer graphene on plasmon resonance absorption. The absorption rates corresponding to the frequencies of f₁ = 26.73995 THz and f₂ = 26.75145 THz, as demonstrated by the results, are 99.72 and 99.64%, respectively. The proposed structure exhibits two ultra-narrow absorption bands with a remarkably small frequency interval (∆f ≈ 11.5 GHz). The absorber functions as a sensitive refractive index detector with high sensitivity and high-quality factors of 11383.59 and 4.2857 THz/RIU. Uniquely, the absorber combines ultrahigh sensitivity (S₂ = 4.2857THz/RIU) and record-breaking quality factors (Q > 11,000), significantly surpassing prior designs. Polarization-insensitive absorption is ensured by the symmetric C4 configuration, while dynamic tunability is demonstrated via Fermi-level modulation (0.4 eV ≤ E_f ≤ 1.0 eV), enabling active spectral shifting of resonance peaks without compromising absorption efficiency. These advancements, supported by coupled-mode theory and full-wave simulations, establish the device as a versatile platform for high-precision refractive index sensing, optical switching, and multifunctional mid-infrared photonic systems. The high \(Q - factor\) and high sensitivity of the design make it possible for the absorber to be used in optical detectors and mid-infrared refractive index sensors.

Graphical abstract

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基于石墨烯超表面的高灵敏度超窄带完美超材料吸收体

本文通过法布里-珀罗共振实现了高质量因数、高灵敏度的双窄带吸收。定量研究了单层石墨烯对等离子体共振吸收的影响。结果表明，f1 = 26.73995 THz和f2 = 26.75145 THz频率对应的吸收率分别为99.72和99.64%, respectively. The proposed structure exhibits two ultra-narrow absorption bands with a remarkably small frequency interval (∆f ≈ 11.5 GHz). The absorber functions as a sensitive refractive index detector with high sensitivity and high-quality factors of 11383.59 and 4.2857 THz/RIU. Uniquely, the absorber combines ultrahigh sensitivity (S2 = 4.2857THz/RIU) and record-breaking quality factors (Q > 11,000), significantly surpassing prior designs. Polarization-insensitive absorption is ensured by the symmetric C4 configuration, while dynamic tunability is demonstrated via Fermi-level modulation (0.4 eV ≤ Ef ≤ 1.0 eV), enabling active spectral shifting of resonance peaks without compromising absorption efficiency. These advancements, supported by coupled-mode theory and full-wave simulations, establish the device as a versatile platform for high-precision refractive index sensing, optical switching, and multifunctional mid-infrared photonic systems. The high \(Q - factor\) and high sensitivity of the design make it possible for the absorber to be used in optical detectors and mid-infrared refractive index sensors.Graphical abstract

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来源期刊

The European Physical Journal Plus PHYSICS, MULTIDISCIPLINARY-

CiteScore

5.40

自引率

8.80%

发文量

1150

审稿时长

4-8 weeks

期刊介绍： The aims of this peer-reviewed online journal are to distribute and archive all relevant material required to document, assess, validate and reconstruct in detail the body of knowledge in the physical and related sciences. The scope of EPJ Plus encompasses a broad landscape of fields and disciplines in the physical and related sciences - such as covered by the topical EPJ journals and with the explicit addition of geophysics, astrophysics, general relativity and cosmology, mathematical and quantum physics, classical and fluid mechanics, accelerator and medical physics, as well as physics techniques applied to any other topics, including energy, environment and cultural heritage.