Active control of electromagnetically induced transparency analog in all-dielectric metamaterials loaded with graphene

Liu, Tingting; Wang, Huaixing; Zhou, Chaobiao; Jiang, Xiaoyun; Xiao, Shuyuan

doi:10.1088/1361-6463/abba96

Cited by 18 publications

(9 citation statements)

References 56 publications

(56 reference statements)

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“…The EIT effect in all-dielectric metamaterial has sharper resonance, which makes it easier to achieve ultra-low loss and better for sensing application. Recent works of the incorporations of tunable materials in all-dielectric EIT metamaterials have been reported for realizing various functions, such as graphenebased tunable EIT effect [208,209].…”

Section: Discussionmentioning

confidence: 99%

Electromagnetically induced transparency metamaterials: theories, designs and applications

Zhu¹,

Dong²

2022

J. Phys. D: Appl. Phys.

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Electromagnetically induced transparency (EIT) stems from a quantum system, where an opaque atomic medium appears the narrow transparent state within a wide absorption area. This phenomenon can be achieved by quantum interference of pumping light and detecting light at different energy levels of transitions. In the generation process of EIT effect, in addition to transparent state, the atomic medium is usually accompanied with a strong dispersion effect, which will bright about a significant reduction of light velocity, thus realizing many important applications, such as slow light propagations. Although the EIT effect has many important applications, its application scenarios are greatly limited due to the fact that EIT realization usually requires specific and complicated conditions, such as refrigeration temperature, high intensity laser, etc. Recently, the analogue of EIT effect in metamaterial has attracted increasing attentions due to its advantages such as controllable room temperature and large operating bandwidth. Metamaterial analogue of EIT effect has become a new research focus. In this article, we review current research progresses on EIT metamaterials. Firstly, we describe the theoretical models for analyzing EIT metamaterials, including the mechanical oscillator model and the equivalent circuit model. Then, we describe the simulations, designs and experiments of passive EIT metamaterials with fixed structures and active EIT metamaterials with tunable elements. Furthermore, the applications of EIT metamaterials in the areas of slow lights, sensings, absorptions and other fields are also reviewed. Finally, the possible directions and key issues of future EIT metamaterial researches are prospected.

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Section: Discussionmentioning

confidence: 99%

Electromagnetically induced transparency metamaterials: theories, designs and applications

Zhu¹,

Dong²

2022

J. Phys. D: Appl. Phys.

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“…The quality factor (Q-factor) is used to explain the property of the transparency peak, which is calculated by the resonance frequency ( f ) dividing the full width at half maximum. The corresponding mathematical formula is the following: / = Q f FWHM [22]. Therefore, the Q-factor of the transparency peak is 39.02.…”

Section: Design Simulation and Experimentsmentioning

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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“…Up until now, graphene has been used as a tunable component in metal-dielectric metamaterials [ 20 , 21 , 22 ]. Recently, in the all-dielectric metamaterial region, using graphene to actively control the EIT effect has been studied in the terahertz band [ 23 , 24 ] and the near-infrared band [ 25 , 26 ]. In addition, due to the narrow transmission peak produced by the EIT effect, the peak position shifts sensitively with the slight changing of the environmental refractive index.…”

Section: Introductionmentioning

confidence: 99%

Active Electromagnetically Induced Transparency Effect in Graphene-Dielectric Hybrid Metamaterial and Its High-Performance Sensor Application

et al. 2021

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Electromagnetically induced transparency (EIT) based on dielectric metamaterials has attracted attentions in recent years because of its functional manipulation of electromagnetic waves and high refractive index sensitivity, such as high transmission, sharp phase change, and large group delay, etc. In this paper, an active controlled EIT effect based on a graphene-dielectric hybrid metamaterial is proposed in the near infrared region. By changing the Fermi level of the top-covered graphene, a dynamic EIT effect with a high quality factor (Q-factor) is realized, which exhibits a tunable, slow, light performance with a maximum group index of 2500. Another intriguing characteristic of the EIT effect is its high refractive index sensitivity. In the graphene-covered metamaterial, the refractive index sensitivity is simulated as high as 411 nm/RIU and the figure-of-merit (FOM) is up to 159, which outperforms the metastructure without graphene. Therefore, the proposed graphene-covered dielectric metamaterial presents an active EIT effect in the near infrared region, which highlights its great application potential in deep optical switching, tunable slow light devices, and sensitive refractive index sensors, etc.

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Active control of electromagnetically induced transparency analog in all-dielectric metamaterials loaded with graphene

Cited by 18 publications

References 56 publications

Electromagnetically induced transparency metamaterials: theories, designs and applications

Electromagnetically induced transparency metamaterials: theories, designs and applications

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

Active Electromagnetically Induced Transparency Effect in Graphene-Dielectric Hybrid Metamaterial and Its High-Performance Sensor Application

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