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Proceedings Paper

Photonic crystals for energy transfer experiments
Author(s): Michael D. Julian; Ryan Desousa; G. K. Surya Prakash; Aaron W. Harper
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Paper Abstract

Incorporation of two dyes into polystyrene beads was achieved through a core-shell emulsion free polymerization. The beads consisted of a central core, a dye containing emissive layer, and an overcoat layer. The overcoat layer thickness determined the final size of the nanospheres. The nanospheres were monodisperse and spherical. The nanospheres were used to asemble two photonic crystals. One in which the stop band overlapped with the dye emission of the donor dye, and one which had no overlap. The crystals formed were characterized by photoluminescence and reflectance studies. The crystal's emission was suppressed where the stop band overlapped the emission. This suppression shows the expected angular dependence and contributes to changes in the efficiency of energy transfer from Coumarin 334 to Nile Red. Suppression of emission and energy transfer impart an angular dependence of the color of emission to the crystal. This results in a material that is tunable with angle of both its reflectivity and its emission.

Paper Details

Date Published: 24 November 2003
PDF: 9 pages
Proc. SPIE 5224, Nanomaterials and Their Optical Applications, (24 November 2003); doi: 10.1117/12.506050
Show Author Affiliations
Michael D. Julian, Loker Hydrocarbon Research Institute (United States)
Univ. of Southern California (United States)
Ryan Desousa, Loker Hydrocarbon Research Institute (United States)
Univ. of Southern California (United States)
G. K. Surya Prakash, Loker Hydrocarbon Research Institute (United States)
Univ. of Southern California (United States)
Aaron W. Harper, Loker Hydrocarbon Research Institute (United States)
Univ. of Southern California (United States)


Published in SPIE Proceedings Vol. 5224:
Nanomaterials and Their Optical Applications
Guozhong Cao; Younan Xia; Paul V. Braun, Editor(s)

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