Journal
OPTICS EXPRESS
Volume 18, Issue 3, Pages 3035-3044Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.003035
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- University Paul Sabatier of Toulouse (France)
- ICREA Funding Source: Custom
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We developed a versatile numerical technique to compute the three-dimensional charge distribution inside plasmonic nanoparticles. This method can be easily applied to investigate the charge distribution inside arbitrarily complex plasmonic nanostructures and to identify the nature of the multipolar plasmon modes involved at plasmonic resonances. Its ability to unravel the physical origin of plasmonic spectral features is demonstrated in the case of a single gold nanotriangle and of a gold nano-antenna. Finally, we show how the volume charge distribution can be used to define and compute the first terms of the multipolar expansion. (C) 2010 Optical Society of America
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