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Phase resonances on metal gratings of identical, equally spaced alternately tapered slits
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10.1063/1.3176408
/content/aip/journal/apl/95/4/10.1063/1.3176408
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/4/10.1063/1.3176408
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Experimental transmissivity (circles) for normal incidence . The solid line represents predictions from the numerical model. Inset: Sample geometry and coordinate system of the experimental structure. The slats have length of approximately 500 mm in the -direction.

Image of FIG. 2.
FIG. 2.

(a) Experimental transmissivity plotted as a function of . White regions correspond to normalized transmissivites in excess of 90%. The dotted black and white lines correspond to the light line and diffracted light line. (b) Predictions of the electric field distribution in the -plane on resonance with normal incidence illumination . The gray scale illustrates time-averaged electric-field magnitude and the arrow heads indicate the direction of the electric field vector at a phase in its temporal cycle corresponding to a maximal intensification. The mode occurs at . The lightest shading corresponds to a field enhancement of at least 15 times.

Image of FIG. 3.
FIG. 3.

Schematic representation of the dispersion of the modes within the first three harmonics supported by our experimental sample. The dashed lines correspond to the light line and diffracted lights lines. The shaded area bordered by the light line represents the region of momentum space within which an incident photon may couple to a mode and the area left of the dot-dashed line corresponds to the region in which experimental data has been taken. The solid lines illustrate the dispersion of the FP-like mode scattered by the grating wave vector and the dotted lines illustrate the dispersion of the phase resonance mode scattered by the grating wave vector .

Image of FIG. 4.
FIG. 4.

Model transmissivity for the “inverse” structure illuminated at normal incidence .

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/content/aip/journal/apl/95/4/10.1063/1.3176408
2009-07-29
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Phase resonances on metal gratings of identical, equally spaced alternately tapered slits
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/4/10.1063/1.3176408
10.1063/1.3176408
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