Plasmonically induced transparency in double-layered graphene nanoribbons

Xia, Shengxuan; Zhai, Xiang; Wang, Lingling; Wen, Shuangchun

doi:10.1364/prj.6.000692

Cited by 291 publications

(96 citation statements)

References 61 publications

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“…In contrast to metallic plasmons, plasmons supported by graphene (a single atomic layer of tightly structured carbon atoms formed to a symmetric hexagonal honeycomb lattice) can not only be continuously and dynamically tuned through electrostatic biasing [24,25], but also have long propagation length, which enables a new generation of restructurable plasmonic devices and, thus, provides an ideal platform to achieve active PIT [26,27]. Although various materials and designs have been used to achieve PIT in pure metal [16,[28][29][30][31] and graphene [32][33][34][35][36][37][38][39][40][41][42], or their hybrid material-based [43][44][45] systems, most of these systems can only realize single PIT effect. For example, one of the common ways to achieve PIT is to design π-shaped/ like metasurfaces [16,28,30,33,37,45].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, they only allow one bright to dark coupling pathway in one particular polarization direction, resulting in only one polarization-dependent PIT effect. Though our previous studies have demonstrated PIT systems with two bright-dark mode coupling pathways in pure graphene nanoribbons (GNRs) [35] or grating-coupled [38] structures, the tally polarization-insensitive single-window PIT or polarization-dependent double-window PIT effects in these systems strongly dependent on the particular choice of the geometrical parameters (see discussion part).…”

Section: Introductionmentioning

confidence: 99%

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Two Switchable Plasmonically Induced Transparency Effects in a System with Distinct Graphene Resonators

et al. 2020

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General plasmonic systems to realize plasmonically induced transparency (PIT) effect only exist one single PIT mainly because they only allow one single coupling pathway. In this study, we propose a distinct graphene resonator-based system, which is composed of graphene nanoribbons (GNRs) coupled with dielectric gratingloaded graphene layer resonators, to achieve two switchable PIT effects. By designing crossed directions of the resonators, the proposed system exists two different PIT effects characterized by different resonant positions and linewidths. These two PIT effects result from two separate and polarization-selective coupling pathways, allowing us to switch the PIT from one to the other by simply changing the polarization direction. Parametric studies are carried to demonstrate the coupling effects whereas the two-particle model is applied to explain the physical mechanism, finding excellent agreements between the numerical and theoretical results. Our proposal can be used to design switchable PIT-based plasmonic devices, such as tunable dual-band sensors and perfect absorbers.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Two Switchable Plasmonically Induced Transparency Effects in a System with Distinct Graphene Resonators

et al. 2020

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“…Importantly, the terahertz modulator can implement both amplitude and frequency modulation. In comparison to other graphene-based terahertz modulators [19][20][21], the amplitude modulation degree can reach 99.57%, meaning an excellent electro-optical switch can be realized, which is not available in other double-layered graphene system based on modulation of surface plasmons [23,24]. Moreover, the extinction ratio of Fano resonance can reach 99.70%, demonstrating an unparalleled electro-optical filter is implemented.…”

Section: Introductionmentioning

confidence: 90%

Terahertz electro-optical multi-functional modulator and its coupling mechanisms based on upper-layer double graphene ribbons and lower-layer a graphene strip

et al. 2020

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A terahertz multifunction modulator composed of upper-layer double graphene ribbons and lower-layer a graphene strip, which can generate a Fano resonance produced by hybrid between a broad mode and a narrow mode, is proposed to realize electro-optical switch and filtering function. The electric field distribution, hybrid theory, and quantum level theory are all employed to explain the Fano resonance, whose transmission spectra are fitted by coupled mode theory. In comparison to other graphene-based terahertz modulators, the amplitude modulation degree can reach 99.57%, meaning an excellent electro-optical switch can be realized. Moreover, the extinction ratio of Fano resonance can reach 99.70%, demonstrating an unparalleled electro-optical filter is implemented. Finally, variations in the lateral and longitudinal lengths of the lower-layer a graphene strip enable excellent dual-band, triple-band filters. Thus, this work provides a new way to implement terahertz multi-function modulators.

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“…The tunable plasmonic resonances in graphene metasurfaces with various geometries have been intensively applied for significantly modulating the reflection, transmission, and absorption of light in the forms of plasmonically induced transparency (EIT) spectra and perfect absorbers. [87,89,[128][129][130][131][132][133][134][135][136][137][138][139][140]…”

Section: Tunable Plasmonic Resonances In Graphene Metasurfacesmentioning

confidence: 99%

Graphene Plasmonics: A Platform for 2D Optics

Fan

Shen

Zhang

et al. 2018

Advanced Optical Materials

169

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2D optics is gradually emerging as a frontier in modern optics. Plasmons in graphene provide a prominent platform for 2D optics in which the light is squeezed into atomic scale. This report highlights some recent progresses in graphene plasmons toward the 2D optics. The launch, observation, and advanced manipulation of propagating graphene plasmons for 2D optical circuits are described. Representative achievements associated with graphene metasurfaces, challenges, recent progresses like photoexcited graphene metasurfaces, and the transformation optics linking 2D to bulk optics with singularity are investigated.Abstract: Two-dimensional (2D) optics is gradually emerging as the frontier in modern optics. Plasmons in graphene provide a prominent platform for two-dimensional optics in which the light is squeezed into an atomic scale. This paper highlights some recent progresses in graphene plasmons towards the 2D optics. The launching, observation, and advanced manipulations of propagating graphene plasmons for 2D optical circuits are described. Representative achievements associated with graphene metasurfaces, challenges, recent progresses like photoexcited graphene metasurfaces and transformation optics linking 2D to bulk optics with singularity are investigated.

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Plasmonically induced transparency in double-layered graphene nanoribbons

Cited by 291 publications

References 61 publications

Two Switchable Plasmonically Induced Transparency Effects in a System with Distinct Graphene Resonators

Two Switchable Plasmonically Induced Transparency Effects in a System with Distinct Graphene Resonators

Terahertz electro-optical multi-functional modulator and its coupling mechanisms based on upper-layer double graphene ribbons and lower-layer a graphene strip

Graphene Plasmonics: A Platform for 2D Optics

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