Graphene integrated rasorber at terahertz frequencies with functionalities of both absorption and transmission

Li, Minhua; Huang, Congying; Huang, Chengye; Song, Yongbo; Shao, Hongxia; Dong, Jianfeng

doi:10.1016/j.rinp.2022.105959

Cited by 15 publications

(6 citation statements)

References 42 publications

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“…The simulated distributions of power loss density under normal incidence in the x-z plane at 6.5 GHz are displayed in figure 5(c). It can be observed that, though the strongest electric field is confined between the cylinder element and the PEC backplane as shown in figure 5(b) due to the strong electric coupling between them [36], the incident EM energy is mainly dissipated inside the cylinder element especially near its upper surface. It can be attributed to the low dielectric loss of F4B material but extremely high electric loss of the carbon black composite.…”

Section: Analysis and Discussionmentioning

confidence: 99%

Broadband carbon-based all-dielectric metamaterial absorber enhanced by high-contrast gratings based spoof surface plasmon polaritons

Guo

Wang²,

Zhuang³

et al. 2023

Phys. Scr.

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In this paper, high-contrast gratings based spoof surface plasmon polaritons (HCG-based SSPPs), as a new mechanism of all-dielectric metamaterial absorbers (ADMMAs), are used to enhance their bandwidth. Accordingly, a broadband ADMMA is designed with carbon black composite. It consists of a cylinder array structure which is made of this composite. The simulation results show that broadband absorption is realized from 6.1GHz to 18GHz with three absorption peaks under a total thickness of 3.9mm. The first peak is attributed to HCG-based SSPPs, while the other two are attributed to diffraction effects. The improved impedance matching characteristic in a wide band also makes an important contribution. The experimental results are agreed roughly with the simulation results. In addition, the structure designed is not a standard HCG, indicating that HCG-based SSPPs are expected to become universal mechanism of ADMMAs. It is believed that this work will push forward further studies on more applications of HCG-based SSPPs in ADMMAs.

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Section: Analysis and Discussionmentioning

confidence: 99%

Broadband carbon-based all-dielectric metamaterial absorber enhanced by high-contrast gratings based spoof surface plasmon polaritons

Guo

Wang²,

Zhuang³

et al. 2023

Phys. Scr.

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show abstract

“…For instance, Figure 8j shows a patterned graphene‐based BMA, [ 402 ] and the simulated absorption curves in Figure 8h,i show that this BMA has a flat broadband absorption. A graphene‐integrated lassoer has also the high absorption at 1.34–3.14 THz, [ 418 ] and a transmission function. The optically transparent graphene‐based hypersurface with high absorption in the microwave band proves its potential application for radar stealth.…”

Section: Design Strategies Of Broadband Metamaterials Absorbersmentioning

confidence: 99%

“…2D Materials: 2D materials are commonly used to construct BMAs, and graphene is chosen as a typical representative of 2D materials in this section. [402,[418][419][420][421] This is because graphene can change the Fermi energy level by applying a bias voltage, which can electrically tune the BMAs (Section 4.3). Here, a few examples of BMAs realized using graphene will be highlighted.…”

Section: Adding Active Materials Designs For Broadband Metamaterials ...mentioning

confidence: 99%

Review of Broadband Metamaterial Absorbers: From Principles, Design Strategies, and Tunable Properties to Functional Applications

Wang

Duan

et al. 2023

Adv Funct Materials

149

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Metamaterial absorbers have been widely studied and continuously concerned owing to their excellent resonance features of ultra-thin thickness, light-weight, and high absorbance. Their applications, however, are typically restricted by the intrinsic dispersion of materials and strong resonant features of patterned arrays (mainly referring to narrow absorption bandwidth). It is, therefore essential to reassert the principles of building broadband metamaterial absorbers (BMAs). Herein, the research progress of BMAs from principles, design strategies, tunable properties to functional applications are comprehensively and deeply summarized. Physical principles behind broadband absorption are briefly discussed, typical design strategies in realizing broadband absorption are further emphasized, such as top-down lithography, bottom-up self-assembly, and emerging 3D printing technology. Diversified active components choices, including optical response, temperature response, electrical response, magnetic response, mechanical response, and multi-parameter responses, are reviewed in achieving dynamically tuned broadband absorption. Following this, the achievements of various interdisciplinary applications for BMAs in energy-harvesting, photodetectors, radar-IR dual stealth, bolometers, noise absorbing, imaging, and fabric wearable are summarized. Finally, the challenges and perspectives for future development of BMAs are discussed.

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“…In this section, an ECM is developed using transmission line theory to get better insight into the working mechanisms of the designed rasorber [5,10,29,36]. The ECM of the designed rasorber is illustrated in figure 9(a).…”

Section: Performance Analysis Using the Ecmmentioning

confidence: 99%

Polarization-insensitive graphene-based THz rasorber with ATA characteristics

Ali,

Bhattacharya

2023

Phys. Scr.

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This paper presents a polarization-insensitive rasorber implemented with absorption-transmission-absorption (ATA) characteristics over three consecutive frequency ranges in the terahertz (THz) band. The proposed rasorber is made of a two-layer periodic structure. These two layers are separated by a spacer made of glass substrate. The unit cells of the top layer have a modified swastika geometry metallization, which is loaded with graphene strips to make it lossy and provide dual-band absorption. In the bottom plane frequency selective surface (FSS), a square ring is engraved on the metal layer to obtain bandpass characteristics between two stopbands provided by the top layer. The designed rasorber works in the 0.2 – 1.2 THz frequency range. It provides wideband absorption with a S 11 < − 10 dB from 0.274 to 1.094 THz with a fractional bandwidth (BW) of around 118 % . An in-band transmission window is designed with a S 21 > − 3 dB in the frequency of 0.615 to 0.719 THz provides a large BW of 104 GHz ( 15.59 % ) for THz communication. Within this transmission band, the lowest insertion loss of 0.27 dB is obtained at 0.686 THz. It provides the absorption of more than 80 % in both the lower band ( 0.276 – 0.442 THz, 46.24 % BW) and the higher band ( 0.861 – 1.094 THz, 23.83 % BW). The simulated response of the designed rasorber using a full-wave electromagnetic simulator and calculated through ECM are found to be in good agreement.

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Graphene integrated rasorber at terahertz frequencies with functionalities of both absorption and transmission

Cited by 15 publications

References 42 publications

Broadband carbon-based all-dielectric metamaterial absorber enhanced by high-contrast gratings based spoof surface plasmon polaritons

Broadband carbon-based all-dielectric metamaterial absorber enhanced by high-contrast gratings based spoof surface plasmon polaritons

Review of Broadband Metamaterial Absorbers: From Principles, Design Strategies, and Tunable Properties to Functional Applications

Polarization-insensitive graphene-based THz rasorber with ATA characteristics

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