scholarly journals Tunable dual plasmon-induced transparency based on a monolayer graphene metamaterial and its terahertz sensing performance

2020 ◽  
Vol 28 (21) ◽  
pp. 31781
Author(s):  
JiaHao Ge ◽  
Chenglong You ◽  
He Feng ◽  
Xiaoman Li ◽  
Mei Wang ◽  
...  
Keyword(s):  
Monolayer Graphene ◽  
Terahertz Sensing ◽  
Induced Transparency ◽  
Sensing Performance ◽  
Plasmon Induced Transparency

Dual plasmon-induced transparency and slow light effect in monolayer graphene structure with rectangular defects

2018 ◽  
Vol 52 (2) ◽  
pp. 025104 ◽  
Author(s):  
Hui Xu ◽  
Mingzhuo Zhao ◽  
Mingfei Zheng ◽  
Cuixiu Xiong ◽  
Baihui Zhang ◽  
...  
Keyword(s):  
Slow Light ◽  
Monolayer Graphene ◽  
Light Effect ◽  
Induced Transparency ◽  
Plasmon Induced Transparency

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

2020 ◽  
Vol 10 (16) ◽  
pp. 5550
Author(s):  
Guanqi Wang ◽  
Xianbin Zhang ◽  
Xuyan Wei
Keyword(s):  
Group Delay ◽  
Monolayer Graphene ◽  
Device Structure ◽  
Coupling Condition ◽  
Conductive Film ◽  
Induced Transparency ◽  
Bright Mode ◽  
Mode Resonator ◽  
The Ideal ◽  
Plasmon Induced Transparency

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.

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

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 448 ◽  
Author(s):  
Heng Xu ◽  
Zhaojian Zhang ◽  
Shangwu Wang ◽  
Yun Liu ◽  
Jingjing Zhang ◽  
...  
Keyword(s):  
Slow Light ◽  
Incident Angle ◽  
Transparency Window ◽  
Monolayer Graphene ◽  
Geometrical Parameters ◽  
Edge Mode ◽  
Mid Infrared ◽  
Transmission Amplitude ◽  
Induced Transparency ◽  
Plasmon Induced Transparency

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.

Dynamically controllable multi-switch and slow light based on a pyramid-shaped monolayer graphene metamaterial

2021 ◽  
Vol 23 (6) ◽  
pp. 3949-3962
Author(s):  
Cuixiu Xiong ◽  
Liu Chao ◽  
Biao Zeng ◽  
Kuan Wu ◽  
Min Li ◽  
...  
Keyword(s):  
Slow Light ◽  
Monolayer Graphene ◽  
Light Effect ◽  
Induced Transparency ◽  
Plasmon Induced Transparency

We can achieve a tunable multi-switch and good slow light effect based on the quadruple plasmon induced transparency effect in a five-step-coupled pyramid-shaped monolayer graphene metamaterial.

Tunable dual plasmon-induced transparency and slow-light analysis based on monolayer patterned graphene metamaterial

2022 ◽  
Author(s):  
Pengju Yao ◽  
Biao Zeng ◽  
Enduo Gao ◽  
Hao Zhang ◽  
Chao Liu ◽  
...  
Keyword(s):  
Absorption Rate ◽  
Slow Light ◽  
Monolayer Graphene ◽  
Destructive Interference ◽  
Group Index ◽  
Coupled Mode ◽  
External Bias ◽  
Internal Mechanism ◽  
Induced Transparency ◽  
Plasmon Induced Transparency

Abstract We propose a novel terahertz metamaterial structure based on patterned monolayer graphene. This structure produces an evident dual plasmon-induced transparency (PIT) phenomenon due to destructive interference between bright and dark modes. Since the Fermi level of graphene can be adjusted by an external bias voltage, the PIT phenomenon can be tuned by adjusting the voltage. Then the coupled-mode theory (CMT) is introduced to explore the internal mechanism of the PIT. After that, we investigate the variation of absorption rate at different graphene carrier mobilities, and it shows that the absorption rate of this structure can reach 50%, which is a guideline for the realization of graphene terahertz absorption devices. In addition, through the study of the slow-light performance for this structure, it is found that its group index is as high as 928, which provides a specific theoretical basis for the study of graphene slow-light devices.

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

2022 ◽  
Author(s):  
Yuhui Li ◽  
Yiping Xu ◽  
Jiabao Jiang ◽  
Liyong Ren ◽  
Shubo Cheng ◽  
...  
Keyword(s):  
Electric Field ◽  
Modulation Depth ◽  
Spectral Response ◽  
Incident Light ◽  
Extinction Ratio ◽  
Fdtd Method ◽  
Monolayer Graphene ◽  
Destructive Interference ◽  
Induced Transparency ◽  
Plasmon Induced Transparency

Abstract 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.

Tunable plasmon-induced transparency with graphene-sheet structure

2016 ◽  
Vol 30 (19) ◽  
pp. 1650232 ◽  
Author(s):  
Yueke Wang ◽  
Xinru Shen ◽  
Quansheng Chen
Keyword(s):  
Numerical Simulation ◽  
Graphene Sheet ◽  
Monolayer Graphene ◽  
Infrared Range ◽  
Transmission Spectra ◽  
Coupled Resonators ◽  
Sheet Structure ◽  
Induced Transparency ◽  
Plasmon Polaritons ◽  
Plasmon Induced Transparency

We investigate theoretically and numerically the tunable plasmon-induced transparency (PIT) phenomenon in graphene-sheet system in infrared range. We show that when surface plasmon polaritons (SPPs) propagate along a monolayer graphene sheet with two detuned side-coupled resonators, the PIT-like transmission spectra of SPPs appear. Thanks to the tunable permittivity of graphene by bias voltages, the resonant wavelength of side-coupled resonators can be changed. So the transmission spectra can be tuned dynamically and the tunable PIT phenomenon is achieved. Numerical simulation by finite element method is conducted to verify our design.

Ultrasensitive and Tunable Sensor Based on Plasmon-Induced Transparency in a Black Phosphorus Metasurface

Plasmonics ◽  
2021 ◽  
Author(s):  
Hao Chen ◽  
Lei Xiong ◽  
Fangrong Hu ◽  
Yuanjiang Xiang ◽  
Xiaoyu Dai ◽  
...  
Keyword(s):  
Black Phosphorus ◽  
Induced Transparency ◽  
Plasmon Induced Transparency
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