A Review on Metamaterial Absorbers: Microwave to Optical

Abdulkarim, Yadgar I.; Mohanty, Ayesha; Acharya, Om Prakash; Appasani, Bhargav; Khan, Mohammad S.; Mohapatra, Sushanta Kumar; Muhammadsharif, Fahmi F.; Dong, Jian

doi:10.3389/fphy.2022.893791

Cited by 46 publications

(18 citation statements)

References 130 publications

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“…Figure 2 presents the reflection and absorption spectra of the sensor in the near infrared region. The absorption (A(ω)) and reflection (R(ω)) coefficients can be derived from the S parameters of the unit cell [22]. The absorption coefficient of the metasurface goes to unity at one particular frequency in the infrared regime.…”

Section: Methodsmentioning

confidence: 99%

Design of a Plasmonic Metasurface for Refractive Index Sensing of Aqueous Glucose

Asim¹,

Čada²

2022

PIER Letters

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In this paper, a new plasmonic absorbing metasurface sensor has been proposed to determine glucose concentrations. Surface Plasmon Resonance (SPR) shift has been used as the indicator of glucose concentration. The sensor employs metal-dielectric-metal configuration along with metal nano-cylinders to provide near unity absorption in the near infrared wavelength range (1800-2200 nm). The absorption frequency shifts when the sensor is surrounded by materials of different refractive indices. The structure has been investigated through Finite Difference Time Domain (FDTD) simulations. The results show reflectance and absorbance peaks with different analyte concentrations. The sensor displays a linear response along with sensitivity and Figure of Merit (FOM) equal to almost 500 nm/RIU and 11.82 RIU −1 , respectively. The proposed sensor has potential applications in food and biomedical industries.

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Section: Methodsmentioning

confidence: 99%

Design of a Plasmonic Metasurface for Refractive Index Sensing of Aqueous Glucose

Asim¹,

Čada²

2022

PIER Letters

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“…The metamaterial is a sub-wavelength artificial material that exhibits unusual electromagnetic (EM) behavior, such as negative permittivity or permeability and negative or positive refractive index [ 1 ]. These properties make metamaterial-based microwave devices extremely popular for various applications such as energy harvesters [ 2 ], filters [ 3 ], sensors [ 4 , 5 , 6 , 7 ], polarization converters [ 8 ], invisible clocks [ 9 ], antenna design [ 10 , 11 , 12 , 13 , 14 , 15 ], SAR reduction [ 16 ], absorber [ 17 ], and photonic devices [ 18 , 19 , 20 , 21 ]. Metamaterial also significantly enables 5G wireless communication, which will be widely used for producing various 5G devices [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Triple-Band Square Split-Ring Resonator Metamaterial Absorber Design with High Effective Medium Ratio for 5G Sub-6 GHz Applications

et al. 2023

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This article proposes a square split-ring resonator (SSRR) metamaterial absorber (MMA) for sub-6 GHz application. The unit cell of the MMA was designed and fabricated on commercially available low-cost FR-4 substrate material with a dielectric constant o 4.3. The higher effective medium ratio (EMR) of the designed unit cell shows the compactness of the MMA. The dimension of the unit cell is 9.5 × 9.5 × 1.6 mm3, which consists of two split rings and two arms with outer SSRR. The proposed MMA operates at 2.5 GHz, 4.9 GHz, and 6 GHz frequency bands with a 90% absorption peak and shows a single negative metamaterial property. The E-field, H-field, and surface current are also explored in support of absorption analysis. Moreover, the equivalent circuit model of the proposed MMA is modelled and simulated to validate the resonance behavior of the MMA structure. Finally, the proposed MMA can be used for the specific frequency bands of 5G applications such as signal absorption, crowdsensing, SAR reduction, etc.

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“…Graphene, as one of the most promising materials in the design of MMAs, has attracted wide attention in recent years [ 5 , 6 ]. Since its conductivity can be easily modulated by external voltages, a number of tunable graphene-based MMAs operating in the microwave band [ 7 , 8 ], mid-infrared band [ 9 ], and terahertz band [ 10 ] have been emerging.…”

Section: Introductionmentioning

confidence: 99%

An Ultra-Broadband and Highly-Efficient Metamaterial Absorber with Stand-Up Gradient Impedance Graphene Films

Chen

et al. 2023

Materials

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Metamaterial absorbers (MMAs) that absorb electromagnetic waves among an ultra-broad frequency band have attracted great attention in military and civilian applications. In this paper, an ultra-broadband and highly-efficient MMA is presented. The unit cell of the proposed MMA was constructed with two cross-placed stand-up gradient impedance graphene films, which play a key role in improving impedance matching. Considering the trade-off between absorbing performance and processing complexity, in our design, we adopted the stand-up graphene films that have a gradient with three orders of magnitude in total. The simulated results of the proposed absorber show an ultra-broadband absorption (absorptivity > 90%) from 1.8 GHz to 66.7 GHz and a highly-efficient absorption (absorptivity > 97%) in the range of 2–21.7 GHz and 39.6–57 GHz. The field analysis was adopted to explain the mechanism of the proposed absorber. To validate this design, a prototype of 20 × 20 units was processed and assembled. The graphene films were processed with graphene conductive ink using screen print technology. The measured results are in good agreement with the simulated ones. The proposed absorber may find potential applications in the field of stealth technologies and electromagnetic interference.

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A Review on Metamaterial Absorbers: Microwave to Optical

Cited by 46 publications

References 130 publications

Design of a Plasmonic Metasurface for Refractive Index Sensing of Aqueous Glucose

Design of a Plasmonic Metasurface for Refractive Index Sensing of Aqueous Glucose

Triple-Band Square Split-Ring Resonator Metamaterial Absorber Design with High Effective Medium Ratio for 5G Sub-6 GHz Applications

An Ultra-Broadband and Highly-Efficient Metamaterial Absorber with Stand-Up Gradient Impedance Graphene Films

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