Enhanced Optical Transmission Through Annular Aperture Arrays: Role of the Plasmonic Guided Modes

Baida, Fadi; Salví, Joaquím

doi:10.1007/978-1-4614-0884-0_9

Cited by 1 publication

(2 citation statements)

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“…It is split by a sharp dip due to the SPR excitation on the metal-glass interface. The dip is located around λ = nm 600 under normal incidence and it is red-shifted when the incidence angle θ is increased according to the equation (6).…”

Section: Resultsmentioning

confidence: 99%

“…This large transmission through subwavelength apertures pierced in an opaque metal film is linked to surface plasmon resonance (SPR) modes at the dielectric/metal interfaces and/or to plasmonic guided modes inside the apertures [3][4][5]. Although most of the works on EOT are based on SPR, guided modes offer a better efficiency and the advantage of increasing the transmission peak wavelength with respect to the nanostructures dimension [6]. Among the possible design of the cavities, coaxial apertures present a higher value of the cut-off wavelength of its fundamental guided mode, namely the TE 11 mode.…”

Section: Introductionmentioning

confidence: 99%

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Resonant optical transmission through sub-wavelength annular apertures caused by a plasmonic transverse electromagnetic (TEM) mode

Ndao

Salví

Salut

et al. 2014

J. Opt.

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We demonstrate enhanced transmission through annular aperture arrays (AAA) by the excitation of the transverse electromagnetic ( ) guided mode. A complete numerical study is performed to correctly design the structure before it is experimentally characterized. Actually, the challenge was to get efficient -based transmission in the visible range. It turned out to be a hard task because of the strong absorption associated with this guided mode. Nevertheless, we have succeeded to experimentally prove its excitation thanks to the enhanced transmission measured in the far-field. This is the first time we demonstrate experimental evidence of this phenomenon with such AAA structure illuminated at oblique incidence in the visible range. This increases the potential applications of such structures as well, single molecule spectroscopy, photovoltaic, spectral filtering, optical trapping, etc...

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Section: Resultsmentioning

confidence: 99%