Super imaging with a plasmonic metamaterial: Role of aperture shape

Xiao, Shiyi; He, Qiong; Huang, Xueqing; Zhou, Lei

doi:10.1016/j.metmat.2011.03.005

Cited by 15 publications

(13 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Whenever the permittivity and/or permeability of a single layer exhibits very large values, such long-wavelength-limit formulas become invalid, even though the whole system still satisfies the subwavelength condition (i.e., the lattice constant of the grating is smaller than wavelength). On the other hand, based on the modeexpansion theory, a delicate approach [21,22] was proposed to homogenize such AB systems, which does not require a strict long-wavelength-limit condition. Unfortunately, the developed theory is limited to the special case that one layer must be a perfect electric conductor (PEC) [21].…”

Section: Introductionmentioning

confidence: 99%

Effective-medium theory for one-dimensional gratings

et al. 2015

Self Cite

View full text Add to dashboard Cite

Based on a mode-expansion theory under single-mode approximation, we derived the scatterings parameters for a general one-dimensional photonic grating composed of two different materials, and then established an effective-medium theory for such a composite by equating the obtained scattering parameters to those of a homogeneous medium. Our effective-medium theory well describes the grating structures with general material and geometrical parameters, and recovers two previous formulas, which are valid only at certain limiting conditions. The theory is justified by full-wave simulations and microwave experiments.

show abstract

Section: Introductionmentioning

confidence: 99%

Effective-medium theory for one-dimensional gratings

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…The scattering properties of such a system can be solved by the standard mode expansion method [17,26,27]. We retain only the fundamental modes in both regions (i.e., the specular reflection in region I and the fundamental waveguide mode inside the aperture) but neglect all the highorder modes.…”

Section: Effective Medium Description Of the Plasmonic Mtmmentioning

confidence: 99%

“…For the structure shown in Figure 11A, one can consider those subwavelength apertures (blue regions) as metallic waveguides supporting a series of eigenmodes. The wave-scattering problems related to such a structure can be rigorously solved within a general mode expansion framework [26]. Under the single-mode approximation, the linear transmittance at normal incidence is given by [46] …”

Section: Slow-wave Effect and Perfect Absorbermentioning

confidence: 99%

Fractal plasmonic metamaterials: physics and applications

Tang¹,

He²,

Xiao³

et al. 2015

Nanotechnology Reviews

Self Cite

View full text Add to dashboard Cite

Abstract:We review our recent works on a particular type of metamaterials (MTMs), which are metallic plates drilled with periodic arrays of subwavelength apertures typically in fractal-like complex shapes. We first show that such MTMs can well mimic plasmonic metals in terms of surface plasmon properties, but with plasmon resonances solely dictated by their aperture geometries rather than the constitutional materials. We then develop an effective-medium description for such plasmonic MTMs based on the mode expansion theory. Based on these theoretical understandings, we show that such MTMs exhibit several interesting applications, such as superlensing, hyperlensing, and enhancing light-matter interactions, which are demonstrated by microwave experiments or full-wave simulations.

show abstract

“…Compared with the wave vector of photons in dielectrics, the propagation constant of SPPs is much larger which makes it possesses the ability to break the traditional diffraction limit and are expected to be used in new generation of miniaturized photonic devices and circuits 5–7 . However, natural SPPs at terahertz (THz) and microwave bands are not available since metals behave like perfect electric conductors (PECs) at these frequencies 8–12 . Recently, spoof surface plasmon polaritons (SSPPs) are proposed by Pendry and his co-workers, which are realized by drilling periodic arrays of holes or grooves so that metals can support surface waves which is similar to optical SPPs in THz and microwave bands 13,14 .…”

Section: Introductionmentioning

confidence: 99%

Compact and highly-confined spoof surface plasmon polaritons with fence-shaped grooves

Ping

Cai

2019

Sci Rep

View full text Add to dashboard Cite

In this paper, a compact and highly-confined spoof surface plasmon polaritons (SSPPs) with fence-shaped grooves is proposed. By adding the metal strips that similar to the fence on the basis of T-grooves, the waves can be confined more tightly as the propagation paths of current are effectively increased, which leads to a reduction of the height of SSPPs units by 48.4% compared to the rectangular grooves. Moreover, compared with conventional SSPPs units mentioned before, the proposed design exhibits the strongest confinement to EM waves. To verify the effectiveness of the proposed unit, a corresponding transmission line is simulated and fabricated. Both simulated and measured results are in good agreement, which show the superior performance of this structure. Meanwhile, due to the simplicity and effectiveness, this proposed structure has a great research and application prospects in developing the miniaturized devices and circuits.

show abstract

Super imaging with a plasmonic metamaterial: Role of aperture shape

Cited by 15 publications

References 24 publications

Effective-medium theory for one-dimensional gratings

Effective-medium theory for one-dimensional gratings

Fractal plasmonic metamaterials: physics and applications

Compact and highly-confined spoof surface plasmon polaritons with fence-shaped grooves

Contact Info

Product

Resources

About