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Light scattering from an ordered array of needle-shaped organic nanoaggregates: Evidence for optical mode launching
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Image of FIG. 1.

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FIG. 1.

Experimental setup. HWP, half-wave plate; P, polarizer; Ph, pinhole; MO, microscope objective; F, filter; and PMT, photomultiplayer. Inset: Fluorescence microscopy image of a sample domain.

Image of FIG. 2.

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FIG. 2.

Intensity of light scattered perpendicularly to the sample surface as a function of the angle of incidence. The incident wave polarization is indicated in the inset.

Image of FIG. 3.

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FIG. 3.

Photoluminescence intensity measured along the normal to the sample surface as a function of the angle of incidence (spot 1).

Image of FIG. 4.

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FIG. 4.

The same as in Fig. 3, but observed from a different spot on the sample (spot 2).

Image of FIG. 5.

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FIG. 5.

Dispersion curves of an infinite isotropic dielectric semicylinder placed on an ideally reflecting surface. The bold inclined dashed line indicates the cutoff line. The other inclined straight lines correspond to light incident at the angles shown in the inset. The open and closed circles represent the measured peaks in the photoluminescence experimental data.

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/content/aip/journal/apl/92/7/10.1063/1.2839396
2008-02-19
2014-04-20

Abstract

Pronounced peaks in both photoluminescence and light scattering from an array of almost parallel oriented, needle-shaped organic nanoaggregates on mica are observed as a function of angle of incidence. Within the framework of a simple theoretical model, we identify those peaks as originating from the launching of normal modes in the nanofibers, both radiative and waveguiding. Quantitative information is obtained about the mode spectrum and morphology of nanoscaled objects from a simple far field scattering measurement.

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Scitation: Light scattering from an ordered array of needle-shaped organic nanoaggregates: Evidence for optical mode launching
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/7/10.1063/1.2839396
10.1063/1.2839396
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