Properties of spoof plasmon in thin structures

Joy, Soumitra Roy; Yu, Hao; Mazumder, Pinaki

doi:10.1098/rspa.2018.0205

Cited by 3 publications

(3 citation statements)

References 34 publications

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“…The breakthrough came as Cui and his coworkers proposed conformal SSPP waveguide based on an ultrathin and flexible film printing serrated metal strip in 2013 [19][20][21], as shown in figure 2(a) [19]. By compressing the metal surface with periodic grooves into an ultrathin comb shape structure along the grooving direction, the dispersion curves keep almost the same shape except for the slight downward movement as shown in the figure 2(b) [20].…”

Section: Similaritiesmentioning

confidence: 99%

“…(1) Transverse magnetic mode with a specific cut-off frequency (2) Exponential decay along the direction perpendicular to the interface (3) Strong field enhancement (4) Frequency dispersion Differences Existing at optical frequency Existing at low frequencies, such as microwave, millimeter wave, and THz Supported by interface of metal Supported by metal surface decorated and air/dielectric with artificial structures Large transmission loss Low transmission loss Applications: chemo-and bio-sensors, Applications: integrated circuits, magneto-optic data storage, and so on wearable technology, and so on The ultra-thin SSPP structure and its (a) design idea. Reproduced from [19] with permission from the Royal Society of Chemistry. (b) variation trend of dispersion curve with metal thickness, (c) cross-section electric field distribution, (d) photograph of the conformal SSPP structures on a flexible and ultrathin dielectric film.…”

Section: Similaritiesmentioning

confidence: 99%

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Spoof surface plasmonics: principle, design, and applications

Cheng

Wang

You

et al. 2022

J. Phys.: Condens. Matter

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Surface plasmon polaritons (SPPs) are interactions between incident electromagnetic (EM) waves and free electrons on the metal-dielectric interface in the optical regime. To mimic SPPs in the microwave frequency, spoof SPPs (SSPPs) on ultrathin and flexible corrugated metallic strips were proposed and designed, which also inherit the advantages of lightweight, conformal, low profile, and easy integration with the traditional microwave circuits. In this paper, we review the recent development of SSPPs, including the basic concept, design principle, and applications along with the development from unwieldy waveguides to ultrathin transmission lines. The design schemes from passive and active devices to SSPP systems are presented respectively. For the passive SSPP devices, the related applications including filters, splitters, combiners, couplers, topological SSPPs, and radiations introduced. For the active SSPP devices, from the perspectives of transmission and radiation, we present a series of active SSPP devices with diversity and flexibility, including filtering, amplification, attenuation, nonlinearity, and leaky-wave radiations. Finally, several microwave systems based on SSPPs are reported, showing their unique advantages. The future directions and potential applications of the ultra-thin SSPP structures in the microwave and millimeter-wave regions are discussed.

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Section: Similaritiesmentioning

confidence: 99%

Section: Similaritiesmentioning

confidence: 99%

Spoof surface plasmonics: principle, design, and applications

Cheng

Wang

You

et al. 2022

J. Phys.: Condens. Matter

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“…Spoof surface plasmon polaritons (sSPP) are surface electromagnetic waves in the microwave and terahertz regimes that propagate via a planar interface between stubs and a dielectric medium as transverse modes of surface plasmons. 1) sSPP are widely used in microwave devices due to their high field confinement at subwavelength scales and low transmission loss, which allow the miniaturization of onchip integrated devices. sSPP waveguide's working mechanism is based on the excitation of surface plasmon polaritons, which have many applications in the microwave range, such as power dividers, 2) frequency splitters, 3) antennas, 4) filters, 5) and potentially various applications in the terahertz range.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of delay lines with spoof surface plasmon polariton waveguide coupled with C-shaped metamaterials for microwave integrated circuits

Nguyen,

Kikuchi,

Kodama

et al. 2024

Jpn. J. Appl. Phys.

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Here, we proposed two delay lines consisting of spoof Surface Plasmon Polariton (sSPP) waveguides and C-shaped metamaterials (C-MMs). The delay lines, namely OFF and ON devices, were designed and fabricated. On the OFF device, an sSPP waveguide is capacitively coupled to the C-MMs via an air gap on a high-resistivity silicon substrate. On the ON device, a connection is established between the C-MMs and the sSPP waveguide by metal connectors. The difference in the electrical properties in the coupling between the C-MMs and the sSPP waveguide creates a large phase contrast between the ON and OFF delay lines. The structural design was performed using a numerical calculation based on a commercial finite element solver. We successfully fabricated and characterized delay lines with phase differences equal to tens of degrees between the ON and OFF devices in the target frequency range of 2-6 GHz, while maintaining the original transmittance properties. The promising applications of the delay lines are a phase shifter or modulator when integrating with suitable switches.

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Active odd-mode-metachannel for single-conductor systems

He¹,

Niu²,

Fan³

et al. 2022

OEA

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Although tremendous efforts have been devoted to investigating planar single-conductor circuits, it remains challenging to provide tight confinement of electromagnetic field and compatibility with active semi-conductor components such as amplifier, harmonic generator and mixers. Single-conductor spoof surface plasmon polariton (SSPP) structure, which is one of the most promising planar single-conductor transmission media due to the outstanding field confinement, still suffers from the difficulty in integrating with the active semi-conductor components. In this paper, a new kind of odd-modemetachannel (OMM) that can support odd-mode SSPPs is proposed to perform as the fundamental transmission channel of the single-conductor systems. By introducing zigzag decoration, the OMM can strengthen the field confinement and broaden the bandwidth of odd-mode SSPPs simultaneously. More importantly, the active semi-conductor amplifier chip integration is achieved by utilizing the intrinsic potential difference on OMM, which breaks the major obstacle in implementing the single-conductor systems. As an instance, an amplifier is successfully integrated on the single-conductor OMM, which can realize both loss compensation and signal amplification. Meanwhile, the merits of OMM including crosstalk suppression, low radar cross section (RCS), and flexibility are comprehensively demonstrated. Hence, the proposed OMM and its capability to integrate with the active semi-conductor components may provide a new avenue to future single-conductor conformal systems and smart skins.

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Properties of spoof plasmon in thin structures

Cited by 3 publications

References 34 publications

Spoof surface plasmonics: principle, design, and applications

Spoof surface plasmonics: principle, design, and applications

Fabrication and characterization of delay lines with spoof surface plasmon polariton waveguide coupled with C-shaped metamaterials for microwave integrated circuits

Active odd-mode-metachannel for single-conductor systems

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