Electromagnetically Induced Transparency Based on Cascaded π-Shaped Graphene Nanostructure

Zhang, Huiyun; Cao, Yanyan; Liu, Yuanzhong; Li, Yue; Zhang, Yuping

doi:10.1007/s11468-016-0451-7

Cited by 10 publications

(7 citation statements)

References 42 publications

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“…21 For this purpose, many active metamaterials have attracted widespread interest from researchers and have been confirmed to be used to achieve tunable PIT effects. [22][23][24][25][26][27] Graphene, as one of the most representative of these active materials, has been widely used to design and achieve tunable PIT effect [28][29][30][31] due to its dramatic optical, electric, and mechanical properties, especially its Fermi energy (E F ) that can be dynamically controlled by external electrostatic gating. Nevertheless, graphene is an ultrathin twodimensional material that is limited in material preparation, and its weak light absorption caused by its high transmittance restricts the scope of application in experiments.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is promising to develop tunable PIT metamaterials to broaden their practical applications 21 . For this purpose, many active metamaterials have attracted widespread interest from researchers and have been confirmed to be used to achieve tunable PIT effects 22–27 . Graphene, as one of the most representative of these active materials, has been widely used to design and achieve tunable PIT effect 28–31 due to its dramatic optical, electric, and mechanical properties, especially its Fermi energy ( E F ) that can be dynamically controlled by external electrostatic gating.…”

Section: Introductionmentioning

confidence: 99%

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Tunable dual‐spectral plasmon‐induced transparency in terahertz Dirac semimetal metamaterials

Wang

Gao

et al. 2023

Micro & Optical Tech Letters

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We have numerically studied a tunable dual-spectral plasmon-induced transparency metamaterial structure based on Dirac semimetal films in the terahertz region. The structure was composed of three length-variant parallel coplanar strips. The dual-spectral plasmon-induced transparency is mainly induced by the bright-bright modes coupling between neighboring Dirac semimetal strips. By adjusting the Fermi energies of Dirac semimetal strips, the individual and synchronous modulation of the dual-transparency window in resonance frequency, bandwidth and strength can be obtained, respectively. Simultaneous change of the Fermi energies of all the strips can achieve an overall frequency shift of the dual-transparency window, with the frequency modulation depth of 21.7% and 20.0%, respectively. The maximum group delays of 5.26 and 3.57 ps for each window were calculated in our proposed structure. The simulation results demonstrated the potential of the proposed structure to expand the applications for slow-light systems, filters, and switchers in the terahertz region.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tunable dual‐spectral plasmon‐induced transparency in terahertz Dirac semimetal metamaterials

Wang

Gao

et al. 2023

Micro & Optical Tech Letters

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“…Therefore, plenty of works about PIT have been investigated in the aspect of nanostructures due to operability at room temperature and wide operational bandwidth. Ever since S. Zhang et al [27] demonstrated a π-shaped metamaterial (MM) structure to research PIT, varieties of MMS structures have been emerging endlessly, including split-ring [28], cut wires [29], U-shape [30] and various combination structures [31,32,33]. Recently, Z. Zhang et al [34] studied a hybrid metal-graphene MM to achieve the active control of broadband PIT in the terahertz (THz) region.…”

Section: Introductionmentioning

confidence: 99%

Tunable Graphene-Based Plasmon-Induced Transparency Based on Edge Mode in the Mid-Infrared Region

Zhang

Shang-wu

et al. 2019

Nanomaterials

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A monolayer-graphene-based concentric-double-rings (CDR) structure is reported to achieve broadband plasmon-induced transparency (PIT) on the strength of edge mode in the mid-infrared regime. The theoretical analysis and simulation results reveal that the structure designed here has two plasmonic resonance peaks at 39.1 and 55.4 THz, and a transparency window with high transmission amplitude at the frequency of 44.1 THz. Based on the edge mode coupling between neighbor graphene ribbons, PIT phenomenon is produced through the interference between different (bright and dark) modes. The frequency and bandwidth of the transparency window and slow light time could be effectively adjusted and controlled via changing geometrical parameters of graphene or applying different gate voltages. Additionally, this structure is insensitive to the polarization and incident angle. This work has potential application on the optical switches and slow light modulators.

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“…Recently, tunable PIT has been numerically investigated by several groups. Their designs are either based on graphene structures, such as Fabry-Perot resonators [18,19], ring resonators [20,21], and cascaded pi-shaped structures [22], or on hybrid metal-graphene metamaterials [13]. However, the successful realization of these numerical investigations has not been achieved due to the fabrication difficulties of the suggested structures.…”

Section: Introductionmentioning

confidence: 99%

Graphene-based tunable plasmon induced transparency in gold strips

Habib

Rashed

Özbay

et al. 2018

Opt. Mater. Express

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Plasmon induced transparency (PIT) has been numerically investigated and experimentally realized by two parallel gold strips on graphene for the mid-infrared (MIR) range. The PIT response is realized by the weak hybridization of two bright modes of the gold strips. The response of the device is adjusted with the lengths of two strips and tuned electrically in real time by changing the Fermi level (E f) of the graphene. E f is changed to tune the resonance frequency of the transparency window. A top gating is used to achieve high tunability and a 263 nm shift is obtained by changing the gate voltage from-0.6 V to 2.4 V. The spectral contrast ratio of our devices is up to 82%.

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Electromagnetically Induced Transparency Based on Cascaded π-Shaped Graphene Nanostructure

Cited by 10 publications

References 42 publications

Tunable dual‐spectral plasmon‐induced transparency in terahertz Dirac semimetal metamaterials

Tunable dual‐spectral plasmon‐induced transparency in terahertz Dirac semimetal metamaterials

Tunable Graphene-Based Plasmon-Induced Transparency Based on Edge Mode in the Mid-Infrared Region

Graphene-based tunable plasmon induced transparency in gold strips

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