A tailored ultra-broadband electromagnetically induced transparency metamaterial based on graphene

Li, Fen-Ying; Zhang, Tao; Chen, Quan-Fang; Ye, Haining; Zhang, Xinlei; Zhang, Haifeng

doi:10.1088/1402-4896/ac3a4b

Cited by 4 publications

(3 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In figure 8, we explored the change of the group index under different incident angles when the carrier mobility µ = 3.0 m 2 V s −1 . We find that when the incident angle is 40 degrees, the group index is as high as 928, which is superior to most previous researches on slow-light devices [33][34][35][36]. Table 1 compares the group index for different slowlight devices previously reported.…”

Section: Simulation and Discussionmentioning

confidence: 66%

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

Yao¹,

Zeng²,

Gao³

et al. 2022

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

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.

show abstract

Section: Simulation and Discussionmentioning

confidence: 66%

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

Yao¹,

Zeng²,

Gao³

et al. 2022

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…Metasurfaces, with artificial electromagnetic response not attainable in natural materials, offer a compact and versatile means of manipulating various characteristics of incident terahertz waves, including phase and amplitude [8][9][10]. Among them, the use of metasurfaces to actively control the resonant response of the electromagnetically induced transparency (EIT) effect has drawn continuous interests [11][12][13]. Moreover, metasurfaces have also been explored for their potential in exciting terahertz SPWs.…”

Section: Introductionmentioning

confidence: 99%

Active control of polarization-dependent terahertz surface plasmonic wave excitation using coupled graphene-metal hybrid metasurfaces

Su,

Li,

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

Active control of terahertz surface plasmonic wave (SPW) intensity in the propagation direction holds substantial significance for advanced terahertz functional devices. In this study, we propose a graphene-metal hybrid split-ring slit resonator (SRSR) array metasurfaces and employ the concept of electromagnetically induced transparency (EIT) to achieve excitation of asymmetric SPWs under various polarization states. By individually integrating two graphene ribbons into the two split-ring slit gaps and applying different bias voltages, we observed a gradual transition in the excitation behavior of asymmetric terahertz SPWs, ultimately resembling that of a single SRSR. Near-field simulations reveal that this phenomenon is attributed to the short-connection effect of graphene. Our proposed graphene-metal active hybrid metasurface introduces a novel approach to realize active SPWs devices, holding potential applications in terahertz on-chip communication.

show abstract

“…EITbased metasurfaces have been widely investigated because of their ability to simulate EIT phenomena in atomic systems without harsh experimental conditions (ultra-low temperature and high-intensity light) [19][20][21]. Since the first implementation of optical-band EIT-like metasurfaces by Zhang et al [22], single-frequency, multi-band, and broadband EIT metasurfaces have been developed [23][24][25][26][27]. Polarization is becoming an attractive characteristic of electromagnetic waves [28], which has a wide scope of applications in imaging, spectroscopy, and communication [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Bifunctional metasurface with ultra-broadband electromagnetically induced transparency and perfect transmissive polarization conversion

Li,

Zhang,

Yao

et al. 2023

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

This paper proposes a metasurface that can simultaneously realize the dual functions of ultra-broadband electromagnetic induced transparency (EIT) and perfect transmission linear polarization conversion (LPC). The metasurface can be regarded as two identical layers separated by air, and each layer is composed of two N-type copper resonators rotated 45° counterclockwise immediately on both sides of the F4B dielectric layer. The simulation results show that the rotating N-type resonator causes the destructive interference of the electric resonance unit's near-field coupling magnetic resonance unit, resulting in an ultra-wideband EIT effect with a maximum transmission coefficient of 0.93 and a relative bandwidth of 40.03%. It was also found that a near-perfect transmission LPC with a polarization conversion ratio (PCR) of 99.97% was obtained near the 9.06 GHz frequency. The physical mechanisms of the EIT phenomenon and LPC are analyzed using the surface current distribution and magnetic field, and the frequency dependence of some structural parameters is also analyzed to illustrate the spectral properties of the depression. The metasurface was fabricated and measured to verify its bifunctional performance. This simultaneous implementation of EIT and LPC on the metasurface provides a new approach for applications in communications, multifunctional device design, and antennas.

show abstract

A tailored ultra-broadband electromagnetically induced transparency metamaterial based on graphene

Cited by 4 publications

References 26 publications

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

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

Active control of polarization-dependent terahertz surface plasmonic wave excitation using coupled graphene-metal hybrid metasurfaces

Bifunctional metasurface with ultra-broadband electromagnetically induced transparency and perfect transmissive polarization conversion

Contact Info

Product

Resources

About