Ultra-high sensitivity sensing based on tunable plasmon-induced transparency in graphene metamaterials in terahertz

He, Zhihui; Cui, Wei; Ren, Xincheng; Li, Chunjiang; Li, Zhenxiong; Xue, Weiwei; Zhang, Bohang; Zhao, Renman

doi:10.1016/j.optmat.2020.110221

Cited by 55 publications

(9 citation statements)

References 47 publications

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“…The PIT phenomenon is similar to EIT, which refers to the appearance of a sharp transparent window in a broad transmittance dip, and it is obtained by near-field coupling between two electromagnetic resonance modes of a bright mode and dark mode or two bright modes. Due to the narrow transmission peak, PIT phenomena have great potential in the applications of filters and sensors [34]. The excitation of trapped modes can also lead to a high transmission response due to the weak coupling of electromagnetic fields.…”

Section: Filtersmentioning

confidence: 99%

Recent progress and applications of terahertz metamaterials

He¹,

He²,

Dong³

et al. 2021

J. Phys. D: Appl. Phys.

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Metamaterials are an artificial electromagnetic material composed of periodic/non-periodic subwavelength micro-/nanostructures, i.e. meta-atoms. The meta-atom interacts with the incident electromagnetic wave and introduces electromagnetic resonance, which makes the metamaterial exhibit the desired electromagnetic characteristics. Therefore, the electromagnetic wave can be controlled by changing the geometry, configuration and distribution of the meta-atoms. Due to their flexible electromagnetic manipulation ability, metamaterials have attracted great interest in many fields, such as super-resolution imaging, high-sensitive detection, aerocraft stealth and laser-machining. A planar metamaterial with one or a few layers of meta-atoms is called a metasurface. The metasurface can not only manipulate the amplitude, phase and polarization of the electromagnetic waves, but also has the advantages of being ultra-thin, ultra-light and easy to process. In the terahertz (THz) region, more and more devices based on metasurfaces have been proposed for spectrum modulation and wavefront shaping, which has contributed to the rapid development of THz technology. This paper reviews the design principles and research progress of metamaterials/metasurfaces for spectrum modulation, wavefront shaping, polarization conversion and surface wave manipulation in the THz region. Active metamaterials can be used to manipulate electromagnetic waves dynamically, and this will become a research field with great application potential. In this review, the implementation schemes and research results of various active THz metamaterial devices are reviewed in detail. Furthermore, the potential applications of metamaterials/metasurfaces in security, high-capacity communication, biomedicine and other fields are analyzed. Finally, we discuss the future developments and challenges of THz metamaterials.

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Section: Filtersmentioning

confidence: 99%

Recent progress and applications of terahertz metamaterials

He¹,

He²,

Dong³

et al. 2021

J. Phys. D: Appl. Phys.

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“…Importantly, by varying the Fermi level of graphene, the broadband of graphene SPPs exhibits the advantage of being highly tunable [14,15]. Based on the above advantages, it has been favored by more and more researchers and widely explored in many applications, such as perfect absorbers [16][17][18], optical switches [19][20][21][22][23][24], optical storages [23][24][25][26][27] and optical biosensors [28].…”

Section: Introductionmentioning

confidence: 99%

Quadruple plasmon-induced transparency and tunable multi-frequency switch in monolayer graphene terahertz metamaterial

Li¹,

Xu²,

Jiang³

et al. 2022

J. Phys. D: Appl. Phys.

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A monolayer graphene metamaterial composed of a graphene block and four graphene strips, which has the metal-like properties in terahertz frequency range, is proposed to generate an outstanding quadruple plasmon-induced transparency (PIT). Additional analyses show that the forming physical mechanism of the PIT with four transparency windows can be explained by strong destructive interference between the bright mode and the dark mode, and the distributions of electric field intensity and electric field vectors under the irradiation of the incident light. Coupled mode theory (CMT) and finite-difference time-domain (FDTD) method are employed to study the spectral response characteristics of the proposed structure, and the theoretical and simulated results are in good agreement. It is found that a tunable multi-frequency switch and excellent optical storage can be achieved in the wide PIT window. The maximum modulation depth is up to 99.7%, which corresponds to the maximum extinction ratio of 25.04 dB and the minimum insertion loss of 0.19 dB. In addition, the time delay is as high as 0.919 ps, the corresponding group refractive index is up to 2755. Thus, the proposed structure provides a new method for the design of terahertz multi-frequency switches and slow light devices.

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“…In 2018, Tang et al realized a refractive index sensing sensitivity of 0.36 THz RIU −1 on a graphene micro-ribbon array structure for single-PIT sensing application [13]. In 2020, He et al achieved 1.713 45 THz RIU −1 on a two-graphene sheet structure for the homologous single-PIT sensing application [14]. In 2021, Cui et al put forward three graphene strips with different shapes for dual-PIT sensing applications and obtained a sensing sensitivity of 4.19 THz RIU −1 [15].…”

Section: Introductionmentioning

confidence: 99%

High-sensitive refractive index sensing and excellent slow light based on tunable triple plasmon-induced transparency in monolayer graphene based metamaterial

Zhou¹,

Xu²,

Li³

et al. 2022

Commun. Theor. Phys.

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A patterned monolayer graphene metamaterial structure consisting of six graphene blocks and two graphene strips is proposed to generate triple plasmon-induced transparency (PIT). Triple-PIT can be effectively modulated by Fermi levels of graphene. The theoretical calculated results by coupled mode theory (CMT) show high matching degree with the numerical simulated results by finite-difference time-domain (FDTD). Intriguingly, the high-sensitive refractive index sensing and excellent slow-light performance can be realized in the proposed graphene metamaterial structure. The sensitivity (S) and figure of merit (FOM) can reach up to 5.7115 THz/RIU and 116.32, respectively. Moreover, the maximum group refractive index is 1036. Hence, these results may provide a new idea for designing graphene-based sensors and slow light devices.

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Ultra-high sensitivity sensing based on tunable plasmon-induced transparency in graphene metamaterials in terahertz

Cited by 55 publications

References 47 publications

Recent progress and applications of terahertz metamaterials

Recent progress and applications of terahertz metamaterials

Quadruple plasmon-induced transparency and tunable multi-frequency switch in monolayer graphene terahertz metamaterial

High-sensitive refractive index sensing and excellent slow light based on tunable triple plasmon-induced transparency in monolayer graphene based metamaterial

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