Electromagnetic transmission through narrow slots in thick conducting screens

Harrington, Roger F.; Auckland, D.T.

doi:10.1109/tap.1980.1142382

Cited by 100 publications

(60 citation statements)

References 8 publications

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“…Recently, some nanostructures namely a single subwavelength slit, a grating with subwavevelength slits and a subwavelength slit surrounded by parallel deep and narrow grooves attracted a particular attention of researchers. The study of resonant enhanced transmission and collimation of waves in close proximity to a single subwavelength slit acting as a microscope probe [1,2,3] was connected with developing near-field scanning microwave and optical microscopes with subwavelength resolution [4,5,6,7]. The resonant transmission of light by a grating with subwavevelength slits and a subwavelength slit surrounded by grooves is an important effect for nanophotonics [8,9,10,11].…”

Section: Introductionmentioning

confidence: 99%

Enhanced transmission versus localization of a light pulse by a subwavelength metal slit

et al. 2004

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The existence of resonant enhanced transmission and collimation of light waves by subwavelength slits in metal films [for example, see T.W. Ebbesen et al., Nature (London) 391, 667 (1998) and H.J. Lezec et al., Science, 297, 820 (2002)] leads to the basic question: Can a light be enhanced and simultaneously localized in space and time by a subwavelength slit? To address this question, the spatial distribution of the energy flux of an ultrashort (femtosecond) wave-packet diffracted by a subwavelength (nanometer-size) slit was analyzed by using the conventional approach based on the Neerhoff and Mur solution of Maxwell's equations. The results show that a light can be enhanced by orders of magnitude and simultaneously localized in the near-field diffraction zone at the nmand fs-scales. Possible applications in nanophotonics are discussed.

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Section: Introductionmentioning

confidence: 99%

Enhanced transmission versus localization of a light pulse by a subwavelength metal slit

et al. 2004

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“…This expression was first reported in Ref. 27 and later rederived in the framework of the CMM 4 by taking the limit w s ≪ λ in Eq. (2).…”

Section: Single Slitmentioning

confidence: 85%

“…Even an infinitesimal narrow slit at resonance in a perfect electric conductor (PEC) film has a large σ pw = λ/π 27 , which is of the order of the wave- . .…”

Section: Introductionmentioning

confidence: 99%

Transmittance of a subwavelength aperture flanked by a finite groove array placed near the focus of a conventional lens

2014

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One-dimensional light harvesting structures illuminated by a conventional lens are studied in this paper. Our theoretical study shows that high transmission efficiencies are obtained when the structure is placed near the focal plane of the lens. The considered structure is a finite slit-groove array (SGA) with a given number of grooves that are symmetrically distributed with respect to a central slit. The SGA is nano-patterned on an opaque metallic film. It is found that a total transmittance of 80 % is achieved even for a single slit when (i) Fabry-Perot like modes are excited inside the slit and (ii) the effective cross section of the aperture becomes of the order of the full width at half maximum of the incident beam. A further enhancement of 8 % is produced by the groove array. The optimal geometry for the groove array consists of a moderate number of grooves (≥ 4) at either side of the slit, separated by a distance of half the incident wavelength λ. Grooves should be deeper (with depth ≥ λ/4) than those typically reported for plane wave illumination in order to increase their individual scattering cross section.

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“…The coupling of electromagnetic fields between the isolated regions through the apertures is widely encountered, and the transmission of an electromagnetic field through a slot aperture in a conducting plate is a canonical problem that has attracted the attention of many researchers [1,2,3,4,5,6,7]. These studies have generally considered 2D problems.…”

Section: Introductionmentioning

confidence: 99%

Penetration electric field characteristics of dual plates with narrow slots for the incident plane wave

Kim

Cho

2014

IEICE Electron. Express

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This study examined the properties of the electric field penetration of a dual metallic wall with narrow slots when the plane wave is incident. Integral equations for aperture electric fields on slots were derived and solved by applying Galerkin's method of moments (MoM). The numerical results showed that a high level of electric field penetration, which is known as transmission resonance, can be obtained for a small plate spacing and two slots with the resonant length when both slots have a slight offset in the slot width direction. The maximum transmission resonance occurred at a transverse slot offset of 0.07λ for a given plate spacing. In addition, the penetration electric field fluctuates with the spacing of the plate, and the fluctuation period is approximately 0.5λ. The experimental measurements are also presented to validate the theory.

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Electromagnetic transmission through narrow slots in thick conducting screens

Cited by 100 publications

References 8 publications

Enhanced transmission versus localization of a light pulse by a subwavelength metal slit

Enhanced transmission versus localization of a light pulse by a subwavelength metal slit

Transmittance of a subwavelength aperture flanked by a finite groove array placed near the focus of a conventional lens

Penetration electric field characteristics of dual plates with narrow slots for the incident plane wave

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