Graphene-based metamaterial absorber for refractive index sensing applications in terahertz band

Nickpay, Mohammad-Reza; Danaie, Mohammad; Shahzadi, Ali

doi:10.1016/j.diamond.2022.109539

Cited by 31 publications

(5 citation statements)

References 79 publications

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“…The results obtained in this paper are compared with similar works in Refs. [ 26 , 27 , 29 , 34 , 35 , 36 , 37 , 38 ] shown in Table 1 . Compared with Refs.…”

Section: Resultsmentioning

confidence: 99%

“…Compared with Refs. [ 29 , 38 ], in terms of pattern structure, our design is simpler and easier to fabricate. Compared with Ref.…”

Section: Resultsmentioning

confidence: 99%

“…The sensor had the maximum sensitivity of 2.475 THz/RIU, Q value of 216.29, and FOM value of 76.89 RIU −1 . In 2022, Nickpay et al [ 29 ] proposed a graphene-based tunable three-band sensor which was composed of a graphene split ring resonator and a patch resonator. Three absorption peaks were at 4.66 THz, 6.035 THz, and 8.72 THz, with absorption rates of 99.2%, 99%, and 89%, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Graphene-Based Tunable Dual-Frequency Terahertz Sensor

Fu,

Ye,

Niu

et al. 2024

Nanomaterials

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A tunable dual-band terahertz sensor based on graphene is proposed. The sensor consists of a metal bottom layer, a middle dielectric layer, and single-layer graphene patterned with four strips on the top. The numerical simulations results show that the proposed sensor exhibits two significant absorption peaks at 2.58 THz and 6.07 THz. The corresponding absorption rates are as high as nearly 100% and 98%, respectively. The corresponding quality factor (Q) value is 11.8 at 2.58 THz and 29.6 at 6.07 THz. By adjusting the external electric field or chemical doping of graphene, the positions of the dual-frequency resonance peak can be dynamically tuned. The excitation of plasma resonance in graphene can illustrate the mechanism of the sensor. To verify the practical application of the device, the terahertz response of different kinds and different thicknesses of the analyte is investigated and analyzed. A phenomenon of obvious frequency shifts of the two resonance peaks can be observed. Therefore, the proposed sensor has great potential applications in terahertz fields, such as material characterization, medical diagnosis, and environmental monitoring.

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“…The results obtained in this paper are compared with similar works in Refs. [ 26 , 27 , 29 , 34 , 35 , 36 , 37 , 38 ] shown in Table 1 . Compared with Refs.…”

Section: Resultsmentioning

confidence: 99%

“…Compared with Refs. [ 29 , 38 ], in terms of pattern structure, our design is simpler and easier to fabricate. Compared with Ref.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Graphene-Based Tunable Dual-Frequency Terahertz Sensor

Fu,

Ye,

Niu

et al. 2024

Nanomaterials

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“…Table 1 shows the comparison with other related absorbers. 25,26,31,32,[37][38][39] The proposed graphene-Ag asymmetrical absorber has some advantages. The structural design is very flexible, and the number of asymmetric silver grating ridges can be designed according to the number of absorption bands required and the ability to independently adjust the position of each absorption peak.…”

Section: Resultsmentioning

confidence: 99%

A TM polarization absorber based on a graphene–silver asymmetrical grating structure for near-infrared frequencies

Wang,

Li,

Chen

et al. 2023

Phys. Chem. Chem. Phys.

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“…Fractal element surfaces exhibit enhanced absorbance by increasing their order [27,28]. In the current study of multi-band absorbers of 2D materials, the distribution of peaks was mainly concentrated in the high frequency band of THz [17,20,29,30]. In addition, many absorbers used complex graphic structures, which increased the complexity of manufacturing.…”

Section: Introductionmentioning

confidence: 83%

A Novel Triple-Band Terahertz Metamaterial Absorber Using a Stacked Structure of MoS2 and Graphene

Cai

Kou

2023

Photonics

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A MoS2 and graphene stacked structure is proposed as metamaterials for a triple-band terahertz absorber in this work. The complementary frequency-selective surface of the absorber, consisting of two crossed linear slots and four pairs of concentric circular slots, has three absorptions at 0.6 THz (99.7%), 1.5 THz (95.4%), and 2.5 THz (99.5%). The polarization of the THz absorber is less sensitive to the incident angle within a certain range. By controlling the material properties of MoS2 and graphene, the peak absorption frequency can be tuned within a certain range. The stacked structure of different 2D materials provides new ideas for the design of the THz absorber, which is important for THz in detection, communication, and imaging applications.

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Graphene-based metamaterial absorber for refractive index sensing applications in terahertz band

Cited by 31 publications

References 79 publications

Graphene-Based Tunable Dual-Frequency Terahertz Sensor

Graphene-Based Tunable Dual-Frequency Terahertz Sensor

A TM polarization absorber based on a graphene–silver asymmetrical grating structure for near-infrared frequencies

A Novel Triple-Band Terahertz Metamaterial Absorber Using a Stacked Structure of MoS2 and Graphene

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