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Polarization-resolved extinction and scattering cross-sections of individual gold nanoparticles measured by wide-field microscopy on a large ensemble
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10.1063/1.4800564
/content/aip/journal/apl/102/13/10.1063/1.4800564
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/13/10.1063/1.4800564
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Figures

Image of FIG. 1.
FIG. 1.

(a) Full color (FC) dark-field image of 40 nm diameter gold NPs. (b) Corresponding FC extinction image Δ from 0 (black) to 0.043 (white). (c) Zoom of dark-field image. Corresponding zoom of the FC bright-field transmission with NP in focus I f (d) and out-of-focus I d (e). (f) Zoom of FC extinction image.

Image of FIG. 2.
FIG. 2.

Distributions of for 104 GNPs of nominal 40 nm diameter in the R, G, and B color channels as indicated. The grey histograms show the noise distribution obtained by measuring in 183 randomly selected regions without NPs.

Image of FIG. 3.
FIG. 3.

Scattering cross-section (stars) measured in dark-field images versus measured in extinction images for 40 nm GNPs and 100 nm GNPs in the green channel. The deduced absorption cross sections σabs are given as circles. The dotted line gives the fitted scaling as labeled. The limiting behaviour for small (dashed line) and large (solid line), and the expected absorption cross-section (short-dashed) are also shown.

Image of FIG. 4.
FIG. 4.

Left column: Distributions of the amplitude α for 150 GNPs of 40 nm diameter in the R, G, and B color channels, and 320 GNPs of 100 nm diameter in the R channel. The distributions due to for GNPs of are given as black lines using as given in Fig. 2 . Right column: in the R channel with fits for two 40 nm GNPs, and distribution of the deduced amplitude parameter α by the measurement noise .

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/content/aip/journal/apl/102/13/10.1063/1.4800564
2013-04-04
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Polarization-resolved extinction and scattering cross-sections of individual gold nanoparticles measured by wide-field microscopy on a large ensemble
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/13/10.1063/1.4800564
10.1063/1.4800564
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