Spoof plasmonic waveguide developed from coplanar stripline for strongly confined terahertz propagation and its application in microwave filters

Guo, Ying; Xu, Kai‐Da; Tang, Xiaohong

doi:10.1364/oe.26.010589

Cited by 66 publications

(44 citation statements)

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“…As such, we identify the GL TL geometry that offers the best switching performance with limited graphene biased/unbiased ratio. Herein, we focus our effort on GL coplanar waveguides and striplines (CPW and CPS) switches, since these TLs are frequently used in mmWave/THz integrated circuits (ICs) [50]- [53]. As such, we expand the theoretical models of the CPW and CPS TLs by incorporating the graphene sheet resistance.…”

Section: Modeling and Analysis Of Sub-millimeter-wavementioning

confidence: 99%

Modeling and Analysis of Sub-Millimeter-Wave Graphene Switches for On-Wafer Coplanar Transmission Lines

Theofanopoulos¹,

Trichopoulos²

2020

Preprint

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We present an analysis of graphene loaded transmission line switches. Namely, we propose equivalent circuit models for graphene loaded coplanar waveguides and striplines and examine the switching performance under certain design parameters. As such, the models account for the distributed effects of electrically-large shunt switches in coplanar waveguides and we use the Babinet’s principle to derive the respective models for the coplanar stripline transmission lines. Using these models, we identify the optimum design of graphene switches based on transmission line characteristic impedance, scaling factor, graphene shape, and topology (series or shunt). We vary these parameters and obtain the insertion loss and ON/OFF ratio. Τhe extracted results can act as the design roadmap toward an optimum switch topology and emphasize the limitations with respect to fabrication challenges, parasitic effects, and radiation losses. In our models, we use measured graphene values (sheet impedance) instead of theoretical equations, to obtain the actual switching performance. Finally, the proposed equivalent models are crucial for this in-depth study; since, we simulated more than 2,000,000 configurations, a computationally challenging task with the use of full-wave solvers

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Section: Modeling and Analysis Of Sub-millimeter-wavementioning

confidence: 99%

Modeling and Analysis of Sub-Millimeter-Wave Graphene Switches for On-Wafer Coplanar Transmission Lines

Theofanopoulos¹,

Trichopoulos²

2020

Preprint

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“…These surface waves with emulated SPP characteristics are called spoof surface plasmon polaritons (SSPPs) [10]. Various metasurface structures that enable SSPP modes, such as planar metamaterials composed by split-ring-resonators [11][12][13], H-shaped patches [14][15][16] or similar metallic patterns [17][18][19][20][21][22][23][24][25] as well as corrugated metal surfaces with grooves and pillars [6,7,[26][27][28][29][30][31][32][33], were proposed in recent years. While metasurfaces composed of ultrathin metallic patterns can be directly processed on printed circuit boards (PCBs) or can be manufactured by straight forward fabrication techniques, corrugated metal surfaces with groove depths of up to several hundred micrometers cannot lean on easy technologies and require more sophisticated fabrication methods.…”

Section: Introductionmentioning

confidence: 99%

“…In highly integrated circuits however, it is mandatory that the metasurface structures also confine the SSPPs within the plane of propagation on a subwavelength scale and allow deliberate waveguiding and routing of the SSPPs on pathways with subwavelength path width. In this context, latest research that covers such flat and compact sized metasurface structures at terahertz frequencies lack experimental evaluation [20][21][22]. They are either restricted to numerical simulation models [20,22] or they only deliver simple proof-in-principle demonstrations in the microwave regime [21].…”

Section: Introductionmentioning

confidence: 99%

“…In this context, latest research that covers such flat and compact sized metasurface structures at terahertz frequencies lack experimental evaluation [20][21][22]. They are either restricted to numerical simulation models [20,22] or they only deliver simple proof-in-principle demonstrations in the microwave regime [21]. For this reason, it was our goal to design and fabricate ultrathin metasurfaces with tailored dispersion to gain full control over the in-plane propagation of terahertz SSPPs, while still maintaining a subwavelength field confinement to the metasurface.…”

Section: Introductionmentioning

confidence: 99%

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Routing of strongly confined terahertz spoof surface plasmon polaritons on metasurfaces along straight and curved pathways with subwavelength width

Becker¹,

Fip²,

Rahm³

2020

Opt. Express

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In search of new technologies for optimizing the performance and space requirements of electronic and optical micro-circuits, the concept of spoof surface plasmon polaritons (SSPPs) has come to the fore of research in recent years. Due to the ability of SSPPs to confine and guide the energy of electromagnetic waves in a subwavelength space below the diffraction limit, SSPPs deliver all the tools to implement integrated circuits with a high integration rate. However, in order to guide SSPPs in the terahertz frequency range, it is necessary to carefully design metasurfaces that allow one to manipulate the spatio-temporal and spectral properties of the SSPPs at will. Here, we propose a specifically designed cut-wire metasurface that sustains strongly confined SSPP modes at terahertz frequencies. As we show by numerical simulations and also prove in experimental measurements, the proposed metasurface can tightly guide SSPPs on straight and curved pathways while maintaining their subwavelength field confinement perpendicular to the surface. Furthermore, we investigate the dependence of the spatio-temporal and spectral properties of the SSPP modes on the width of the metasurface lanes that can be composed of one, two or three cut-wires in the transverse direction. Our investigations deliver new insights into downsizing effects of guiding structures for SSPPs.

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“…More recently, the terahertz high-order mode broadband SSPPs propagation is proposed for the first time, which indicates that high-order mode transmission has significant potential for application at microwave and terahertz frequencies [28]. Meanwhile, linear and nonlinear microwave devices based on SSPPs TLs have been proposed, which lays the foundation for the future establishment of SSPP system [29]- [37].…”

Section: Introductionmentioning

confidence: 99%

A Novel Three-Dimensional Integrated Spoof Surface Plasmon Polaritons Transmission Line

Shen

Xue

et al. 2019

IEEE Access

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In this paper, a novel three-dimensional integrated spoof surface plasmon polaritons (SSPPs) transmission line (TL) is proposed. The controlled slow surface wave can propagate along unit cells that are planted on a metal strip periodically, which is similar to the typical SSPPs TLs. The dispersion characteristics and high-order modes of the proposed TL are studied. In order to verify the transmission performance of the proposed TL, a two-dimensional (2D) structure is utilized to do like the conversion. We have designed the proposed TL and give the simulated results from 10-25GHz, which show good propagation performance. The ohmic losses and dielectric losses of the proposed TL and typical 2D SSPPs TLs are simulated and compared with the microstrip line, coplanar waveguide. The measured data for the proposed TL indicates that the measured results are close to the simulations. The low-loss and highly integrated characteristics of the proposed TL plays an important role in the microwave and terahertz SSPPs transmission and integrated circuits. INDEX TERMS Spoof surface plasmon polaritons (SSPPs), dispersion characteristics, high-order modes, loss characteristics.

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Spoof plasmonic waveguide developed from coplanar stripline for strongly confined terahertz propagation and its application in microwave filters

Cited by 66 publications

References 0 publications

Modeling and Analysis of Sub-Millimeter-Wave Graphene Switches for On-Wafer Coplanar Transmission Lines

Modeling and Analysis of Sub-Millimeter-Wave Graphene Switches for On-Wafer Coplanar Transmission Lines

Routing of strongly confined terahertz spoof surface plasmon polaritons on metasurfaces along straight and curved pathways with subwavelength width

A Novel Three-Dimensional Integrated Spoof Surface Plasmon Polaritons Transmission Line

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