Analogue of tunable electromagnetically induced transparency based on graphene-nanostrip in two perpendicular polarization directions

Shu, Chang; Mei, Jinshuo

doi:10.1016/j.optcom.2019.01.041

Cited by 14 publications

(8 citation statements)

References 33 publications

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“…The tuning can be realized by changing structural parameters, using tunable materials and microelectromechanical systems (MEMS) technology. Due to the high flexibility, tunable materials-based PIT devices have become a research hotspot [17][18][19][20][21][22][23][24]. Graphene is especially widely used in the design of tunable PIT devices because of its high electron mobility, high modulation depth, tunable surface conductivity and low insertion loss characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…Graphene is especially widely used in the design of tunable PIT devices because of its high electron mobility, high modulation depth, tunable surface conductivity and low insertion loss characteristics. Tunable graphene-based PIT devices can realize different functions, such as the single-PIT [18][19][20], dual-PIT [21][22][23] and multi-PIT [24]. Recently, STO has also aroused the interest of researchers due to its temperature-tunable relative permittivity [25].…”

Section: Introductionmentioning

confidence: 99%

“…For example, in references [18,19,22,23], researchers proposed the metamaterials to realize the regulation of the PIT peak intensity. In references [20,21,24,26], researchers realized the regulation of the frequency of the PIT peak. To our knowledge, the tunable PIT metamaterial with independently tunable amplitude and frequency of dual-PIT effect has not been previously reported.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dual-Spectral Plasmon-Induced Transparent Terahertz Metamaterial with Independently Tunable Amplitude and Frequency

Wang

Jia

et al. 2021

Nanomaterials

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A bifunctional tunable metamaterial composed of pattern metal structure, graphene, and strontium titanate (STO) film is proposed and studied numerically and theoretically. The dual plasmon-induced transparency (PIT) window is obtained by coupling the bright state cut wire (CW) and two pairs of dark state dual symmetric semiring resonators (DSSRs) with different parameters. Correspondingly, slow light effect can also be realized. When shifting independently, the Fermi level of the graphene strips, the amplitudes of the two PIT transparency windows and slow light effect can be tuned, respectively. In addition, when independently tuning the temperature of the metamaterial, the frequency of the dual PIT windows and slow light effect can be tuned. The physical mechanism of the dual-PIT was analyzed theoretically by using a three-harmonic oscillator model. The results show that the regulation function of the PIT peak results from the change of the oscillation damping at the dark state DSSRs by tuning conductivity of graphene. Our design presents a new structure to realize the bifunctional optical switch and slow light.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dual-Spectral Plasmon-Induced Transparent Terahertz Metamaterial with Independently Tunable Amplitude and Frequency

Wang

Jia

et al. 2021

Nanomaterials

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“…Therefore, achieving tunability of results has become a major research focus. [17][18][19][20] There are many types of active or tunable materials in nature that have been incorporated into metamaterials, such as ferroelectrics, 21 liquid crystals, 22,23 semiconductors, 24,25 two-dimensional materials, [26][27][28][29] and phase change materials. 30,31 Xiao et al proposed a graphene-based metasurface structure that exhibits a tunable EIT response under mid-infrared frequencies.…”

Section: Introductionmentioning

confidence: 99%

Dual-Tunable Polarization Insensitive Electromagnetically Induced Transparency in Metamaterials

Ning

Xiao

Chen

et al. 2021

Journal of Elec Materi

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A multilayer structure of a square ring of graphene with nesting vanadium dioxide (VO2) was investigated in this study. This structure exhibits electromagnetically induced transparency (EIT), which stems from a bright mode coupling with a dark mode. The permittivity values of graphene and VO2 can be modulated via chemical potential and temperature, respectively. The EIT effect can be tuned based on the chemical potential of graphene and temperature of VO2, resulting in a dual-tunable EIT effect. Simulation results confirmed that this dual-tunable EIT phenomenon is insensitive to polarization. These results may have potential applications in terahertz devices, such as slow light devices, switching devices, and sensors.

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“…Based on the remarkable tunability of graphene conductivity in the terahertz band, many terahertz control devices are proposed with graphene as the active material [12][13][14][15][16]. The combination of graphene and metallic metamaterials, and the design of metamaterials based on a patterned graphene structure can be the basis of the construction of tunable PIT metamaterials [17][18][19][20][21][22][23]. However, it is difficult to tune the surface conductivity of patterned graphene resonators, which limits the scalability of these tunable approaches in practical application.…”

Section: Introductionmentioning

confidence: 99%

Tunable Plasmon-Induced Transparency through Bright Mode Resonator in a Metal–Graphene Terahertz Metamaterial

2020

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The combination of graphene and metamaterials is the ideal route to achieve active control of the electromagnetic wave in the terahertz (THz) regime. Here, the tunable plasmon-induced transparency (PIT) metamaterial, integrating metal resonators with tunable graphene, is numerically investigated at THz frequencies. By varying the Fermi energy of graphene, the reconfigurable coupling condition is actively modulated and continuous manipulation of the metamaterial resonance intensity is achieved. In this device structure, monolayer graphene operates as a tunable conductive film which yields actively controlled PIT behavior and the accompanied group delay. This device concept provides theoretical guidance to design compact terahertz modulation devices.

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Analogue of tunable electromagnetically induced transparency based on graphene-nanostrip in two perpendicular polarization directions

Cited by 14 publications

References 33 publications

Dual-Spectral Plasmon-Induced Transparent Terahertz Metamaterial with Independently Tunable Amplitude and Frequency

Dual-Spectral Plasmon-Induced Transparent Terahertz Metamaterial with Independently Tunable Amplitude and Frequency

Dual-Tunable Polarization Insensitive Electromagnetically Induced Transparency in Metamaterials

Tunable Plasmon-Induced Transparency through Bright Mode Resonator in a Metal–Graphene Terahertz Metamaterial

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