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Near- to far-field imaging of free-space and surface-bound waves emanating from a metal nanoslit
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10.1063/1.2834900
/content/aip/journal/apl/92/2/10.1063/1.2834900
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/2/10.1063/1.2834900
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Silver nanoslit radiation profiles scanned along the direction perpendicular to the probe axis. A nanoapertured fiber probe was aligned normal to the substrate (a) or 45° tilted (b). (a) Top-view SEM image of a -wide slit (top left) (scale bar: ). The scan profiles obtained at various probe-surface distances. (b) A micrograph of a nanoprobe aligned close to metal surface with 45° tilt angle (top left). A mirror image of the probe is seen on the bottom side. The scan profiles obtained at various radial distances.

Image of FIG. 2.
FIG. 2.

Radiation pattern of a silver nanoslit obtained by linearly scanning a nanoapertured probe along the radial direction with the probe axis tilted parallel to the scan direction. (a) A micrograph of a nanoprobe aligned close to metal surface with 85° tilt angle (top left). (b) The log-log scale plots of the scanned profiles (intensity versus radial distance). The dependence expected from cylindrical wave propagation is shown for reference. (c) Radiation patterns plotted in polar coordinates for various radial distances (intensity in linear scale).

Image of FIG. 3.
FIG. 3.

FDTD simulation of nanoslit radiation. (a) Snap-shot images of field distributions, (left) and (right). (b) Intensity distribution (left: log scale for intensity) and the direction of energy flow (right: orientation of the time-averaged Poynting vector). (c) Radiation intensity versus radiation angle for various radial distances (intensity in log scale). Measurement results are also shown for comparison (asterisk for , square for , triangle for , and filled circle for ).

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/content/aip/journal/apl/92/2/10.1063/1.2834900
2008-01-14
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Near- to far-field imaging of free-space and surface-bound waves emanating from a metal nanoslit
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/2/10.1063/1.2834900
10.1063/1.2834900
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