Angle dependent light scattering by gold nanospheres

INERA Conference 2015: Light in Nanoscience and Nanotechnology

Wang, J.X.^1 ; Nilsson, A.M.^1 ; Fernandes, D.L.A.^2 ; Niklasson, G.A.^1

Division of Solid State Physics, Department of Engineering Sciences, Ångström Laboratory, Uppsala University, P. O. Box 534, Uppsala

SE-751 21, Sweden^1

Division of Physical Chemistry, Department of Chemistry, The Ångström Laboratory, Uppsala University, P. O. Box 534, Uppsala

SE-751 21, Sweden^2

关键词: Absorption and scatterings;    Angle-resolved light scattering;    Electric field enhancement;    Enhanced light absorptions;    Gold nanocrystals;    Localized surface plasmon resonance;    Single scattering;    Transmittance and reflectances;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/682/1/012018/pdf
DOI  :  10.1088/1742-6596/682/1/012018

来源: IOP

【 摘 要 】

Gold nanocrystals exhibit unique optical properties in enhanced light absorption and scattering owing to their extremely large scattering/absorption cross-sections and large electric field enhancements generated by localized surface plasmon resonance. In this work, the optical properties of gold nanospheres with diameters of 60 nm and 200 nm with remarkable uniformity in size were studied both numerically and experimentally. The total transmittance and reflectance as well as the angle-resolved light scattering intensities of the gold nanospheres were measured. The absorption and scattering coefficients were obtained by fitting the experimental data to the two-flux theory and were in qualitative agreement with single-scattering calculations using the Mie theory.