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Plasmonic optical antennas on dielectric gratings with high field enhancement for surface enhanced Raman spectroscopy
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10.1063/1.3168498
/content/aip/journal/apl/94/26/10.1063/1.3168498
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/26/10.1063/1.3168498
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Top: The geometry of the designed structure with silver nanorod optical antennas on 2D silicon nitride grating surface. Bottom right: field map at the surface of the grating at resonance. Bottom left: versus wavelength calculated by RCWA at point A as marked on the inset to the right. is the magnitude of the incident electric field.

Image of FIG. 2.
FIG. 2.

at the center of the antenna gap calculated by FEM simulation, for three situations: (a) antenna with on dielectric grating substrate (solid line), (b) antenna with on 200 nm substrate without grating (dotted line), and (c) antenna with on dielectric substrate without grating (broken line). Inset: the field distribution at the cross section of the antenna 5 nm above the grating surface for (a).

Image of FIG. 3.
FIG. 3.

for nanodisk on the grating as shown in Fig. 1 (solid line) and without grating (dotted line) calculated by FEM simulation. The field is measured at the side surface of the nanodisk 2.5 nm above the grating surface (point B in the left inset; refer to the coordinate system here and that in Fig. 1). Right inset: the field distribution at the cross section of the disk at the resonance frequency 2.5 nm above the grating surface.

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/content/aip/journal/apl/94/26/10.1063/1.3168498
2009-07-02
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Plasmonic optical antennas on dielectric gratings with high field enhancement for surface enhanced Raman spectroscopy
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/26/10.1063/1.3168498
10.1063/1.3168498
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