2 May 2014 Changes in the optical properties of two gold nanoparticles caused by different connection types
Author Affiliations +
Abstract
The goal of our paper was to investigate the impact of the necking phenomenon on the optical properties of two gold nanoparticles characterized by a large value of the imaginary part of the refractive index m. Our results show that the difference between various neck types is small, therefore, for the modeling process, we recommend the most simple one, i.e. the cylindrical connector. When a connection between two primary particles is caused by the overlap factor Cov, and not by the neck size parameter Ycon, the results can be much more erroneous and the possible error should be at least taken into consideration. The position of the extinction peak in a function of the connection size Cov is dependent on the value of the complex refractive index m. Additionally, the applicability of the DDA (Discrete Dipole Approximation) method for measuring the extinction cross section Cext of gold structures was studied.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Krzysztof Skorupski, "Changes in the optical properties of two gold nanoparticles caused by different connection types", Proc. SPIE 9126, Nanophotonics V, 912635 (2 May 2014); doi: 10.1117/12.2052319; https://doi.org/10.1117/12.2052319
PROCEEDINGS
8 PAGES


SHARE
Back to Top