Abstract.
The extinction spectrum of single silver nanoparticles with size ranging from 20 to 80 nm is investigated with the spatial modulation spectroscopy technique using either a tunable laser or a white lamp as the broadband source. Results are in good agreement with the prediction of the Mie theory, permitting to extract the nanoparticle size from the measured absolute value of the optical extinction cross-section. In contrast, the deduced refractive index of the nanoparticle environment and the reduction of the electron mean free path show a large dependence on the precise value of the bulk silver dielectric function.
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Billaud, P., Huntzinger, JR., Cottancin, E. et al. Optical extinction spectroscopy of single silver nanoparticles. Eur. Phys. J. D 43, 271–274 (2007). https://doi.org/10.1140/epjd/e2007-00112-y
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DOI: https://doi.org/10.1140/epjd/e2007-00112-y