Electromagnetically Induced Transparency-Like Approach Based on Terahertz Metamaterials for Ultrasensitive Refractive Index Sensors

Cao, Pengfei; Li, Congcong; Li, Yuan; Wu, Yuyao; Chen, Xieyu; Wu, Tong; Zhang, Xueqian; Yuan, Min; Wang, Zelong

doi:10.1109/jsen.2021.3135938

Cited by 18 publications

(15 citation statements)

References 38 publications

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“…These results show that, compared with the resonant peak, the EIT-like window is more sensitive to the refractive index of the external environment, especially for the unilateral asymmetric material structure (102.3 GHz/RIU). More specifically, the extracted results were compared with similar results reported in [10,11,17,[28][29][30], as shown in Table 1. It can be found that the two metamaterial structure sensors proposed in this work showed broader bandwidth and good sensing prop- The performance of the sensor was mainly characterized by several important parameters, including the refractive index sensitivity (S), Q-factor, and figure of merit (FOM).…”

Section: Refractive Index Sensing Characteristics Of Metamaterialsmentioning

confidence: 99%

“…More specifically, the extracted results were compared with similar results reported in [10,11,17,[28][29][30], as shown in Table 1. It can be found that the two metamaterial structure sensors proposed in this work showed broader bandwidth and good sensing properties.…”

Section: Refractive Index Sensing Characteristics Of Metamaterialsmentioning

confidence: 99%

“…Compared with natural materials and chemical synthetic materials, artificial metamaterials have attracted the attention of researchers due to their unique electromagnetic advantages, such as negative conductivity and negative permeability [7][8][9]. Many structures of EIT have been proposed, including cut wires resonators (CWR) [10], and split-ring resonators (SRR) [11,12]. Some other symmetric typical terahertz metamaterials structures, including fishing net structure [13], dipole-coupled quadrupole [14] have also been investigated to achieve EIT-like phenomenon.…”

Section: Introductionmentioning

confidence: 99%

“…Active modulation manifests as real-time adjustment of the transparent window. It can be operated by external fields such as temperature modulation, light modulation, or DC electric field modulation [10,17,24]. It is necessary to optimize the design of the metamaterial structure to achieve a better transparent window in the terahertz band and expand more novel application functions of terahertz metamaterials such as high sensitivity, high Q-factor, and tunable EIT-like effect.…”

Section: Introductionmentioning

confidence: 99%

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Tunable Electromagnetically Induced Transparent Window of Terahertz Metamaterials and Its Sensing Performance

Ding

et al. 2022

Applied Sciences

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The electromagnetically induced transparency effect of terahertz metamaterials exhibits excellent modulation and sensing properties, and it is critical to investigate the modulation effect of the transparent window by optimizing structural parameters. In this work, a unilateral symmetrical metamaterial structure based on the cut-wire resonator and the U-shaped split ring resonator is demonstrated to achieve electromagnetically induced transparency-like (EIT-like) effect. Based on the symmetrical structure, by changing the structural parameters of the split ring, an asymmetric structure metamaterial is also studied to obtain better tuning and sensing characteristics. The parameters for controlling the transparent window of the metamaterial are investigated in both passive and active modulation modes. In addition, the metamaterial structure based on the cut-wire resonator, unilateral symmetric and asymmetric configurations are investigated for high performance refractive index sensing purposes, and it is found that the first two metamaterial structures can achieve sensitivity responses of 63.6 GHz/RIU and 84.4 GHz/RIU, respectively, while the asymmetric metamaterial is up to 102.3 GHz/RIU. The high sensitivity frequency response of the proposed metamaterial structures makes them good candidates for various chemical and biomedical sensing applications.

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Section: Refractive Index Sensing Characteristics Of Metamaterialsmentioning

confidence: 99%

Section: Refractive Index Sensing Characteristics Of Metamaterialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tunable Electromagnetically Induced Transparent Window of Terahertz Metamaterials and Its Sensing Performance

Ding

et al. 2022

Applied Sciences

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“…In the research of metasurface, there are two approaches to mimic EIT phenomenon. One is the coupling between bright and dark modes [11], and the other is make structure of metasurfaces symmetry to break down [12]. For instance, Zhang et al [13] designed a hybrid metal-graphene EIT-like metamaterial with two orthogonally twisted split ring resonators.…”

Section: Introductionmentioning

confidence: 99%

All-dielectric electromagnetically induced transparency-like metasurface with breaking symmetric

Shen

Wang

Lü

2022

Mater. Res. Express

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We investigate an all-dielectric metasurface to mimic the electromagnetically induced transparency-like phenomenon in the microwave. The unit cell is comprised of two hollow split ring resonators with different parameters, which form an asymmetric structure. The proposed metasurface acquires a high transmission efficiency at 17.17 GHz, which is caused by magnetic resonance. The corresponding physical mechanism is discussed and analyzed by the distributions of the electric and magnetic fields. The experiment result of the transmission spectra is well in agreement with the simulation data. The geometric parameter of hollow split ring resonators has deep influences on transmission spectra which leads to transparency peak variation. Concurrently, the imaginary parts of the effective permittivity and permeability for the proposed metasurface are presented to explain the low-loss property. Furthermore, the transparency peak is sensitive to the surrounding environment, which exhibits potential application in refractive index sensor.

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Tunable high-Q metasurface for terahertz optical switching and sensing

Deng

Gao

et al. 2023

Optik

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Electromagnetically Induced Transparency-Like Approach Based on Terahertz Metamaterials for Ultrasensitive Refractive Index Sensors

Cited by 18 publications

References 38 publications

Tunable Electromagnetically Induced Transparent Window of Terahertz Metamaterials and Its Sensing Performance

Tunable Electromagnetically Induced Transparent Window of Terahertz Metamaterials and Its Sensing Performance

All-dielectric electromagnetically induced transparency-like metasurface with breaking symmetric

Tunable high-Q metasurface for terahertz optical switching and sensing

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