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Guided modes supported by plasmonic films with a periodic arrangement of subwavelength slits
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10.1063/1.2164905
/content/aip/journal/apl/88/3/10.1063/1.2164905
http://aip.metastore.ingenta.com/content/aip/journal/apl/88/3/10.1063/1.2164905
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color) Guided-mode band diagram for TM polarization (first Brillouin zone) when , , . Shown are two degenerate surface modes (red curves) and a series of effective dielectric slab modes (blue curves). The dashed line is the light line in vacuum. Inset shows the schematic of a metallic film with periodic slits: is the slit width, is the periodicity, and is the film thickness. The gray regions indicate metal and the white regions represent vacuum .

Image of FIG. 2.
FIG. 2.

(Color) -field distributions for the two types of guided modes supported by the geometry shown in Fig. 1. Distributions are shown for in units of . Frequencies are given in units of . (a) Fundamental effective dielectric slab mode at , (b) next-higher-order effective dielectric slab mode at , and (c) and (d) surface modes at . Red and blue correspond to large positive and negative field values, respectively, and green represents zero field.

Image of FIG. 3.
FIG. 3.

(Color) Effects of film thickness and surface properties on the guided-mode band diagram for TM polarization. Shown are two degenerate surface modes (red curves) and a series of effective dielectric slab modes (blue curves). The dashed line is the light line in vacuum. (a) Reduction in film thickness (, , ) and (b) perfect electric conductor (PEC) coating on plasmonic film. Inset shows the schematic of the metal film with periodic slits. The gray regions indicate metal coated with a thin PEC film (black) and the white regions represent vacuum .

Image of FIG. 4.
FIG. 4.

(Color) Guided-mode band diagram for TM polarization (first Brillouin zone) when , , . Shown are a series of odd (red curves) and even (blue curves) modes. The dashed line is the light line in vacuum. Insets show the field distributions for . (a) -field distribution for the fundamental effective dielectric slab mode at ; (b) and (c) -field distribution of the symmetric (even) coupled modes at and , respectively; and (d) and (e) -field distribution of antisymmetric (odd) coupled modes at and , respectively. Red and blue correspond to large positive and negative field values, respectively, and green represents zero field.

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/content/aip/journal/apl/88/3/10.1063/1.2164905
2006-01-17
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Guided modes supported by plasmonic films with a periodic arrangement of subwavelength slits
http://aip.metastore.ingenta.com/content/aip/journal/apl/88/3/10.1063/1.2164905
10.1063/1.2164905
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