Waveguide Arrays as Plasmonic Metamaterials: Transmission below Cutoff

Hibbins, Alastair P.; Lockyear, Matthew J.; Hooper, Ian R.; Sambles, J. R.

doi:10.1103/physrevlett.96.073904

Cited by 81 publications

(35 citation statements)

References 14 publications

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“…On the contrary, for the (0,21)/(21,1) mode whose resonant frequency, f sw , is .f c , the strong coupling between the surface waves and the hole modes should be the dominant mechanism for the transmitted wave. 4 Eventually, we could distinguish spoof surface plasmons from coupled modes by modes splitting effect.…”

Section: Resultsmentioning

confidence: 99%

“…3 At THz frequencies, however, the dielectric properties of metals are those of perfect electric conductors, therefore, there are no surface plasmon polaritons with which to couple. 4 Instead of surface plasmon polaritons, spoof surface plasmon polaritons can form on a metal surface with a designed periodic structure and contribute to an enhancement in transmission. 5 However, the theory of spoof surface plasmon polaritons is limited to arrays with periodicities that are much smaller than the resonant wavelength.…”

Section: Introductionmentioning

confidence: 99%

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Mode splitting transmission effect of surface wave excitation through a metal hole array

et al. 2013

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The resonant frequencies of the excited surface waves on a metal hole array with respect to the incident angle were studied in the terahertz region. The experimental and theoretical results demonstrate that the resonant peak of surface wave excitation splits into two when transmitted through a metal hole array off-normally. The high-order mode with resonant frequency above the cutoff frequency f c (plasma frequency effect) has a shorter attenuation length than that of the low-order mode whose resonant frequency is below f c . The reason is that the high-order mode is a coupled mode consisting of surface wave and hole modes, while the low-order mode is just an excited surface wave (which can be considered as the spoof surface plasmons). Our investigation may open a door to distinguish the spoof surface plasmons and the coupled modes of surface waves and hole modes.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mode splitting transmission effect of surface wave excitation through a metal hole array

et al. 2013

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“…However, for the filled-hole sample (ε = 4.7) one observes a very different response in the character of the higher-order modes. We observe an inflection point in the dispersion curves and an asymptotic approach to the effective surface plasma frequency SP 26 GHz ν with increasing θ . This plasmonic-like behavior has been well separated in frequency from the band bending associated with the photonic effects (the lower band edge observed from the unfilled sample is at ~ 32 GHz for θ = 30°).…”

Section: ν =mentioning

confidence: 78%

“…However the aforementioned proposal of Pendry et al [19,20] was that a structured perfectly conducting surface may support SP-like waves that behave in a similar manner to those known to exist on real metals. Here we use microwave transmission measurements and FEM modeling not only to provide further verification of this new class of mode but also to confirm its role in enhanced transmission observed for perforated, perfectly conducting layers [26].…”

Section: Transmission Below Cutoffmentioning

confidence: 79%

Surface plasmons on metamaterials

2008

Self Cite

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The field of plasmonics has historically been a playground exclusively for the optics community. Primarily this is because the response of metals becomes dominated by their large conductivities at much lower frequencies, making it difficult to exploit the unique properties of surface plasmon (SP) modes. Indeed SPs on flat, perfectly conducting substrates are better described as simple surface currents or grazing photons. However the realization that one can form metaldielectric composites to support surface waves with plasmon-like properties has opened the field of plasmonics to the terahertz and microwave domains. Pendry et al. [Science, 305, 847 (2004)] were among the first to speculate about an extension of plasmonics into long wavelength regimes. They demonstrated that the perforated surface of a perfect conductor can support a SP-like mode whose behavior is determined purely by the geometry of the substrate. Beginning with our initial experimental verification of these SP-like modes excited via grating-coupling, we present an overview of some of our recent microwave studies. We progress to study the classical method of prism coupling and also consider the enhanced transmission phenomenon (mediated by plasmon-like surface modes) through hole arrays. Finally the first experimental evidence of coupled SP-like modes between two such perforated metal substrates placed in close proximity will be presented.

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“…However, Pendry et al recently proposed that a PEC with an array of holes drilled in its surface can support surface modes that are associated with the behavior of the SPs [8][9][10]. Later, Hibbins et al experimentally verified these surface plasmon-like (SPL) modes at microwave frequencies [11,12]. Like SPs, coupled SPL modes are also present on a thin perforated PEC film and two perforated PEC substrates that are placed nearby [13,14].…”

Section: Introductionmentioning

confidence: 93%

Bloch Oscillations of Surface Plasmon-Like Modes in Waveguide Arrays That Comprise Perforated Perfect Conductor Layers and Dielectric Layers

Cheng¹,

Lan²

2011

Plasmonics

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This study investigates the optical Bloch oscillations (OBOs) in waveguide arrays that consist of alternative perfect electric conductor (PEC) layers and dielectric layers by performing both numerical simulations and theoretical analyses. In PEC dielectric waveguide arrays (PDWAs), the PEC layers are perforated with square holes to support the surface plasmon-like (SPL) modes. The relative permittivities of the dielectric layers have a constant gradient across the waveguide arrays. The OBOs in the PDWAs arise because of the excitation and coupling of the SPL modes. The ray trajectories that are predicted using Hamiltonian optics are consistent with the simulated results. When the position of incidence is fixed, the period of oscillation varies as the reciprocal of the incident frequency. However, the amplitude of oscillation is almost independent of the frequency. For a fixed incident frequency, the amplitude and period of oscillation increases and decreases, respectively as the position of incidence moves toward the dielectric layers with higher relative permittivities.

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Waveguide Arrays as Plasmonic Metamaterials: Transmission below Cutoff

Abstract: TITLEWaveguide arrays as plasmonic metamaterials: transmission below cutoff AUTHORSHibbins, Alastair P.; Lockyear, Matthew J.; Hooper, Ian R.; et al. JOURNAL Physical Review Letters DEPOSITED IN ORE

Cited by 81 publications

References 14 publications

Mode splitting transmission effect of surface wave excitation through a metal hole array

Mode splitting transmission effect of surface wave excitation through a metal hole array

Surface plasmons on metamaterials

Bloch Oscillations of Surface Plasmon-Like Modes in Waveguide Arrays That Comprise Perforated Perfect Conductor Layers and Dielectric Layers

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