Changes in the optical properties of two gold nanoparticles caused by different connection types

Krzysztof Skorupski

doi:10.1117/12.2052319

2 May 2014 Changes in the optical properties of two gold nanoparticles caused by different connection types

Krzysztof Skorupski

Proceedings Volume 9126, Nanophotonics V; 912635 (2014) https://doi.org/10.1117/12.2052319
Event: SPIE Photonics Europe, 2014, Brussels, Belgium

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 C_ov, and not by the neck size parameter Y_con, 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 C_ov 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 C_ext of gold structures was studied.

Citation Download Citation

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); https://doi.org/10.1117/12.2052319

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