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15 October 2012 Localized surface plasmon resonance of degenerate semiconducting nanocrystal ensembles with various shape distributions
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Abstract
Nanocrystals of degenerate semiconductors come in a variety of shapes, which have profound influence on the localized surface plasmons which are supported. Ensembles of such nanocrystals are never perfect and will always show a distribution of shapes. By embedding the Drude model into Mie scattering theory, the effect of the shape inhomogeneity on the absorbance spectrum of a nanocrystal ensemble can be approximated for a few common cases such as nanorods and nanodiscs as well as general ellipsoids. Using various distributions of aspect ratios, broadening and shifting of the various plasmonic absorption peaks is observed for nanorod and nanodisc ensembles. Similar behavior is also observed for ensembles of nearly spherical nanocrystals, which emphasizes the importance of accounting for nanocrystal shape inhomogeneity when investigating broadening mechanisms of nanocrystal plasmonic absorbance.
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Rueben J. Mendelsberg "Localized surface plasmon resonance of degenerate semiconducting nanocrystal ensembles with various shape distributions", Proc. SPIE 8456, Nanophotonic Materials IX, 845602 (15 October 2012); https://doi.org/10.1117/12.931096
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