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The resonant electromagnetic fields of an array of metallic slits acting as Fabry-Perot cavities
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10.1063/1.2204818
/content/aip/journal/jap/99/12/10.1063/1.2204818
http://aip.metastore.ingenta.com/content/aip/journal/jap/99/12/10.1063/1.2204818
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic diagrams of the (a) etalon, (b) dielectric slab, and (c) metallic slit array sample geometries. In each case, radiation is incident parallel to the axis and polarized with the electric vector parallel to the axis.

Image of FIG. 2.
FIG. 2.

Predictions of the amplitude of the electric and magnetic fields (normalized to the amplitude of the incident field) through the etalon structure (; ; ) on resonance of the fundamental mode. Inset: Modeled transmissivity spectrum.

Image of FIG. 3.
FIG. 3.

Predictions of the amplitude of the electric and magnetic fields (normalized to the amplitude of the incident field) through the high index dielectric slab (; ) structure on resonance of the fundamental mode. Inset: Modeled transmissivity spectrum.

Image of FIG. 4.
FIG. 4.

Predictions of the amplitude of the electric and magnetic fields (normalized to the amplitude of the incident field) along a line at the mid width of a slit cavity (; ; ) in a perfect conductor on resonance of the fundamental mode. Inset: Modeled transmissivity spectrum.

Image of FIG. 5.
FIG. 5.

Predictions of the time-averaged field amplitudes and (normalized to the amplitude of the incident field) on resonance of the fundamental mode of the slit array. Also shown is the difference between these two field differentials, which has the same form as . Inset: Time-averaged electric field strength around the end of the slit . White regions correspond to field enhancement factors of at least 65.

Image of FIG. 6.
FIG. 6.

Time-averaged electric field strength on resonance of the fundamental mode of an array of tilted slit cavities . Radiation is incident in the direction, polarized with its electric vector parallel to the axis. White regions correspond to field enhancement factors (compared with the intensity of the incident field) of at least 100 (linear scale). Inset: Modeled transmission spectra of an array of identical slits formed at an angle to the surface normal. The angle is varied while keeping the slit length, width, and pitch fixed.

Image of FIG. 7.
FIG. 7.

Time-averaged electric field strength on resonance of the fundamental mode of more complex metallic slit-cavity arrays. For each structure a single unit cell is shown and radiation is incident in the direction, polarized with the electric vector parallel to the axis. (a) Total cavity , cavity . White regions correspond to field enhancements of at least 80 times. (b) The structure studied in Ref. 14: , cavity (core) , cavity (core) refractive . White regions correspond to enhancements of 20 times or more. (c) Vertical sections have length of , the pair of upper horizontal sections has length of , the lower horizontal length is , and cavity . White regions correspond to field enhancements of at least 180 times (log scale). Left-hand inset: Transmission spectra. Right-hand inset: An enlargement around the final vertical length of the cavity. The greyscale is linear with white shading corresponding to enhancements of at least 125 times.

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/content/aip/journal/jap/99/12/10.1063/1.2204818
2006-06-20
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The resonant electromagnetic fields of an array of metallic slits acting as Fabry-Perot cavities
http://aip.metastore.ingenta.com/content/aip/journal/jap/99/12/10.1063/1.2204818
10.1063/1.2204818
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