Terahertz Metamaterials Broadband Perfect Absorber Based on Molybdenum Disulfide

Luo, Xingfang; Xiang, Peiwen; Yu, Heming; Huang, Shan; Yu, Ting; Zhu, Yuan-Feng

doi:10.1109/lpt.2022.3202991

Cited by 13 publications

(2 citation statements)

References 25 publications

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“…Among them, the resonant ring is in contact with the glass layer, thus creating a possibility for fabrication. Among them, the conductivity of copper is σ = 5.8 × 10 7 S/m [30]; the permittivity of glass is ε = 4 [31]; the long-axis RI of the liquid crystal is n e = 1.799; and the short-axis RI of the liquid crystal is n o = 1.513 [32]. In accordance with the axes defined in Figure 1, the initial orientation of the LC is defined in this paper to be towards the y-axis while pointing to the z-axis in the full-bias state.…”

Section: Theory and Modelmentioning

confidence: 99%

A Liquid Crystal-Modulated Metastructure Sensor for Biosensing

Liao

Chen

et al. 2023

Sensors

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In this paper, a liquid crystal-modulated metastructure sensor (MS) is proposed that can detect the refractive index (RI) of a liquid and change the detection range under different applied voltages. The regulation of the detection range is based on the different bias states of the liquid crystal at different voltages. By changing the sample in the cavity that is to be detected, the overall electromagnetic characteristics of the device in the resonant state are modified, thus changing the position of the absorption peaks so that different RI correspond to different absorption peaks, and finally realizing the sensing detection. The refractive index unit is denoted as RIU. The range of the refractive index detection is 1.414–2.828 and 2.121–3.464, and the corresponding absorption peak variation range is 0.8485–1.028 THz and 0.7295–0.8328 THz, with a sensitivity of 123.8 GHz/RIU and 75.6 GHz/RIU, respectively. In addition, an approach to optimizing resonant absorption peaks is explored, which can suppress unwanted absorption generated during the design process by analyzing the energy distribution and directing the current flow on the substrate. Four variables that have a more obvious impact on performance are listed, and the selection and change trend of the numerical values are focused on, fully considering the errors that may be caused by manufacturing and actual use. At the same time, the incident angle and polarization angle are also included in the considered range, and the device shows good stability at these angles. Finally, the influence of the number of resonant rings on the sensing performance is also discussed, and its conclusion has guiding value for optimizing the sensing demand. This new liquid crystal-modulated MS has the advantages of a small size and high sensitivity and is expected to be used for bio-detection, sensing, and so on. All results in this work were obtained with the aid of simulations based on the finite element method.

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Section: Theory and Modelmentioning

confidence: 99%

A Liquid Crystal-Modulated Metastructure Sensor for Biosensing

Liao

Chen

et al. 2023

Sensors

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“…In the current single-layered structures, frequency-selective surfaces usually adopt regular shapes, such as circular, spiral, cross line, and square ribbon, to achieve a Special Display and Imaging Technology Innovation Center of Anhui Province, broadband characteristics. [21][22][23][24][25][26] However, the relative bandwidth of these patterns is limited because their equivalent circuits are simple series RLC circuits or parallel circuits. 19,24,27 The insufficient bandwidth of single-layered structures, as well as the large size and the complexity of the multilayered structures, limits the practical application of tunable 2D material absorbers.…”

Section: Introductionmentioning

confidence: 99%

A tunable broadband terahertz MoS₂ absorber using series–parallel hybrid network design

Cai,

Kou,

Deng

2023

Phys. Chem. Chem. Phys.

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Dielectric‐Based Metamaterials for Near‐Perfect Light Absorption

Wang,

Qin,

Duan

et al. 2024

Adv Funct Materials

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The emergence of metamaterials and their continued prosperity have built a powerful working platform for accurately manipulating the behavior of electromagnetic waves, providing sufficient possibility for the realization of metamaterial absorbers with outstanding performance. However, metamaterial absorbers composed of metallic materials typically possess many unfavorable factors, such as non‐adjustable absorption, easy oxidation, low‐melting, and expensive preparation costs. The selection of dielectric materials provides excellent alternatives due to their remarkable properties, thus dielectric‐based metamaterial absorbers (DBMAs) have attracted much attention. To promote breakthroughs in DBMAs and guide their future development, this work systematically and deeply reviews the recent research progress of DBMAs from four different but progressive aspects, including physical principles; classifications, material selections and tunable properties; preparation technologies; and functional applications. Five different types of theories and related physical mechanisms, such as Mie resonance, guided‐mode resonance, and Anapole resonance, are briefly outlined to explain DBMAs having near‐perfect absorption performance. Mainstream material selections, structure designs, and different types of tunable DBMAs are highlighted. Several widely utilized preparation methods for customizing DBMAs are given. Various practical applications of DBMAs in sensing, stealth technology, solar energy absorption, and electromagnetic interference suppression are reviewed. Finally, some key challenges and feasible solutions for DBMAs’ future development are provided.

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Terahertz Metamaterials Broadband Perfect Absorber Based on Molybdenum Disulfide

Cited by 13 publications

References 25 publications

A Liquid Crystal-Modulated Metastructure Sensor for Biosensing

A Liquid Crystal-Modulated Metastructure Sensor for Biosensing

A tunable broadband terahertz MoS₂ absorber using series–parallel hybrid network design

Dielectric‐Based Metamaterials for Near‐Perfect Light Absorption

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Terahertz Metamaterials Broadband Perfect Absorber Based on Molybdenum Disulfide

Cited by 13 publications

References 25 publications

A Liquid Crystal-Modulated Metastructure Sensor for Biosensing

A Liquid Crystal-Modulated Metastructure Sensor for Biosensing

A tunable broadband terahertz MoS2 absorber using series–parallel hybrid network design

Dielectric‐Based Metamaterials for Near‐Perfect Light Absorption

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A tunable broadband terahertz MoS₂ absorber using series–parallel hybrid network design