High Sensitivity of Metasurface-Based Five-Band Terahertz Absorber

Sabaruddin, Nursafwanah Ramizah; Tan, Yu Ming; Chou Chao, Chung-Ting; Kooh, Muhammad Raziq Rahimi; Chou Chau, Yuan-Fong

doi:10.1007/s11468-023-01989-5

Cited by 13 publications

(4 citation statements)

References 92 publications

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“…The working principle of our proposed absorber is based on the impedance matching and destructive interference conditions [42]. Impedance matching means that the input impedance of the metasurface is equal to the characteristic impedance of the medium, which ensures that there is no reflection of the incident wave.…”

Section: Structural Design and Methodologymentioning

confidence: 99%

“…Destructive interference means that the transmitted wave from the metasurface is canceled out by the reflected wave from the ground plane, which ensures that there is no transmission of the incident wave. Therefore, the incident wave is fully absorbed by the metasurface and converted into other forms of energy, such as heat or electricity [42]. In the presence of light, the entirety depicted in Fig.…”

Section: Structural Design and Methodologymentioning

confidence: 99%

See 1 more Smart Citation

Graphene-Metamaterial Based Tunable Broadband Polarization Insensitive Absorber for Terahertz Antenna Design

Rahad,

Mohsin,

Belal Hossain Bhuian

et al. 2024

IEEE Access

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The advent of graphene has opened new avenues for the design of high-performance metamaterial devices, particularly in the realm of electromagnetic absorption applications. This paper introduces a novel design for a broadband tunable graphene metamaterial absorber (GMMA) utilizing graphene. Through numerical simulations, our proposed GMMA demonstrates a absorption bandwidth of 3 THz (1.14 -4.14 THz) with absorptivity exceeding 90% for both transverse magnetic (TM) and transverse electric (TE) modes. A comprehensive numerical analysis, using a transmission line equivalent circuit model, is conducted to find out the impedance components of all the corresponding layers, which can be significant to determine the impedance matching. The absorber exhibits wideband tunability, polarization insensitivity, and robust tolerance to structural variations, making it a promising candidate for diverse applications in the terahertz (THz) band especially in the antenna regime. Our proposed GMMA antenna can achieve a gain of 37.48 dB, a directivity of 32.81 dB, a return loss of -34 dB, and an efficiency of 99.96%. This research provides a valuable contribution to the development of tunable broadband GMMAs for THz frequencies, addressing the increasing demand for high-speed and efficient devices in the modern era of science and technology.

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Section: Structural Design and Methodologymentioning

confidence: 99%

Section: Structural Design and Methodologymentioning

confidence: 99%

Graphene-Metamaterial Based Tunable Broadband Polarization Insensitive Absorber for Terahertz Antenna Design

Rahad,

Mohsin,

Belal Hossain Bhuian

et al. 2024

IEEE Access

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“…The primary operating principles of those configurations are to counteract or block the interaction between the array elements in terms of surface current within the dielectric substrate, eventually bringing a significant improvement in isolation. Recently, metasurface (MS) has been widely used by antenna designer as its superior features [ 21 , 22 ]. The decoupling MS can be positioned in the same layer [ 23 , 24 ] or above the patches [ 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Metasurface-based dual-sense circularly polarized antenna for MIMO/full-duplex applications

Tran-Viet,

Nguyen Tuan,

Nguyen Quoc

et al. 2024

PLoS ONE

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This paper introduces a two-element antenna array with dual-sense circular polarization, wideband operation, and high isolation characteristics. The antenna consists of two conventional truncated corner patches and an extra layer of metasurface (MS) located above the radiating patches. The overall dimensions of the proposed antenna are 0.92 λ0 × 0.73 λ0 × 0.05 λ0 and the element spacings are 0.02 λ0 and 0.39 λ0 with respect to edge-to-edge and center-to-center spacings. For validation, measurements on a fabricated antenna prototype are carried out. The measured data demonstrate that the presented MS-based antenna has a wide operating bandwidth of 14.5% with high isolation of better than 26 dB. The excellent performance could be concluded from the results of the investigation, which indicates that the proposed MS-based antenna could be a good candidate for multiple-input multiple-output (MIMO) and full-duplex applications.

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“…High Q factor and high sensitivity have been the unremitting pursuit in the field of THz spectroscopy detection. Conventional metamaterial design methods such as surface plasmon resonance (SPR) [ 14 , 15 , 16 ], Fano resonance [ 17 ], electromagnetically induced transparency (EIT) [ 18 , 19 ] and Mie resonance [ 20 , 21 ] have difficulty achieving both high Q factor and high sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Detection of Low-Concentration Biological Samples Based on a QBIC Terahertz Metamaterial Sensor

Dong,

Wei,

Wei

et al. 2024

Sensors

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Quasi-bound state in the continuum (QBIC) can effectively enhance the interaction of terahertz (THz) wave with matter due to the tunable high-Q property, which has a strong potential application in the detection of low-concentration biological samples in the THz band. In this paper, a novel THz metamaterial sensor with a double-chain-separated resonant cavity structure based on QBIC is designed and fabricated. The process of excitation of the QBIC mode is verified and the structural parameters are optimized after considering the ohmic loss by simulations. The simulated refractive index sensitivity of the sensor is up to 544 GHz/RIU, much higher than those of recently reported THz metamaterial sensors. The sensitivity of the proposed metamaterial sensor is confirmed in an experiment by detecting low-concentration lithium citrate (LC) and bovine serum albumin (BSA) solutions. The limits of detection (LoDs) are obtained to be 0.0025 mg/mL (12 μM) for LC and 0.03125 mg/mL (0.47 μM) for BSA, respectively, both of which excel over most of the reported results in previous studies. These results indicate that the proposed THz metamaterial sensor has excellent sensing performances and can well be applied to the detection of low-concentration biological samples.

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High Sensitivity of Metasurface-Based Five-Band Terahertz Absorber

Cited by 13 publications

References 92 publications

Graphene-Metamaterial Based Tunable Broadband Polarization Insensitive Absorber for Terahertz Antenna Design

Graphene-Metamaterial Based Tunable Broadband Polarization Insensitive Absorber for Terahertz Antenna Design

Metasurface-based dual-sense circularly polarized antenna for MIMO/full-duplex applications

Detection of Low-Concentration Biological Samples Based on a QBIC Terahertz Metamaterial Sensor

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