High-Contrast Gratings based Spoof Surface Plasmons

Li, Zhuo; Liu, Liang Liang; Xu, Bing Zheng; Ning, Ping; Chen, Chen; Xu, Jia; Chen, Xin Lei; Gu, Chang Qing; Qing, Quan

doi:10.1038/srep21199

Cited by 26 publications

(12 citation statements)

References 34 publications

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“…In order to realize high-confinement SPPs at microwave and THz frequencies, corrugated metallic structures are proposed to support and propagate the SPPs, called spoof SPPs [11][12][13], which display very similar features in dispersion properties, subwavelength confinement, field enhancements, and environment sensitivity as those of the optical SPPs [14][15][16]. Much effort has been put into generating highly confined spoof SPPs with desired functions at microwave and THz frequencies [17][18][19][20][21][22]. Cui et al have demonstrated the guiding of spoof SPPs on ultrathin metal films to a very long distance at microwave frequencies [20].…”

Section: Introductionmentioning

confidence: 99%

Terahertz spoof surface-plasmon-polariton subwavelength waveguide

Zhang

Tian

et al. 2017

Photon. Res.

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Surface plasmon polaritons (SPPs) with the features of subwavelength confinement and strong enhancements have sparked enormous interest. However, in the terahertz regime, due to the perfect conductivities of most metals, it is hard to realize the strong confinement of SPPs, even though the propagation loss could be sufficiently low. One main approach to circumvent this problem is to exploit spoof SPPs, which are expected to exhibit useful subwavelength confinement and relative low propagation loss at terahertz frequencies. Here we report the design, fabrication, and characterization of terahertz spoof SPP waveguides based on corrugated metal surfaces. The various waveguide components, including a straight waveguide, an S-bend waveguide, a Y-splitter, and a directional coupler, were experimentally demonstrated using scanning near-field terahertz microscopy. The proposed waveguide indeed enables propagation, bending, splitting, and coupling of terahertz SPPs and thus paves a new way for the development of flexible and compact plasmonic circuits operating at terahertz frequencies.

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Section: Introductionmentioning

confidence: 99%

Terahertz spoof surface-plasmon-polariton subwavelength waveguide

Zhang

Tian

et al. 2017

Photon. Res.

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“…The entries of the matrix M are of the form (8), where . The first (second) line in (8) is used for the lines of M coming from projections of the Ht continuity on the x (y) components of each mode.…”

mentioning

confidence: 99%

Nonresonant modes in plasmonic holey metasurfaces for the design of artificial flat lenses

et al. 2017

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This Letter discusses nonresonant modes excited on holey metasurfaces and their influence on the properties of spoof plasmonic states supported by the metasurface when a second surface is placed in its proximity. We consider here a metallic surface with periodic holes drilled in it. The field excited on each hole is projected onto a set of nonresonant modes in order to discuss their relative relevance. While previous simpler models assumed only the presence of the fundamental mode, we show that the simultaneous presence of several modes occurs when the surface is placed next to a metallic plate. Therefore, higher-order modes are responsible for the peculiar physical properties of wave propagation of spoof plasmons between two surfaces, which can lead to new gradient-index flat lenses for transceivers for space communications.

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“…Since then, extensive theoretical and experimental works have been performed to verify the existence of spoof LSPs in various textured metallic structures [20][21][22][23][24]. In addition, we also have demonstrated that a hollow metallic cylinder corrugated by periodic cut-through slits can supports the magnetic and electric dipole resonances similar to the subwavelength dielectric nanoparticles with a high-refractive index at optical frequencies, as the spoof Mie resonant structure [25].…”

Section: Introductionmentioning

confidence: 97%

Tunable multiband directional electromagnetic scattering from spoof Mie resonant structure

Chen

et al. 2018

Sci Rep

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We demonstrate that directional electromagnetic scattering can be realized in an artificial Mie resonant structure that supports electric and magnetic dipole modes simultaneously. The directivity of the far-field radiation pattern can be switched by changing wavelength of the incident light as well as tailoring the geometric parameters of the structure. In addition, we further design a quasiperiodic spoof Mie resonant structure by alternately inserting two materials into the slits. The results show that multi-band directional light scattering is realized by exciting multiple electric and magnetic dipole modes with different frequencies in the quasiperiodic structure. The presented design concept is suitable for microwave to terahertz region and can be applied to various advanced optical devices, such as antenna, metamaterial and metasurface.

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High-Contrast Gratings based Spoof Surface Plasmons

Cited by 26 publications

References 34 publications

Terahertz spoof surface-plasmon-polariton subwavelength waveguide

Terahertz spoof surface-plasmon-polariton subwavelength waveguide

Nonresonant modes in plasmonic holey metasurfaces for the design of artificial flat lenses

Tunable multiband directional electromagnetic scattering from spoof Mie resonant structure

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