Design Considerations Influencing Optical Response in Gold Spherical Nanoparticles

Abstract:

In this article, the relations between extinction cross section and Gold nanoparticle's parameters such as dimensions have been investigated. In this work, the extinction cross section of the core-shell nanoparticles is analyzed by changing the shell material and its thickness. By this, the interesting results such as shifting resonant peak in optical response are obtained. Moreover, a new model of nanostructure is proposed in which the resonant peak of extinction cross section can be controlled by adding silicon nanoparticles and impurity in the shell. This method can be used for tuning of the scattering properties of the core-shell nanoparticle. In the following, we demonstrate that the effective epsilon properties can be used for tuning of the desired optical response in the combinational structure of the spherical nanoparticles. At the end, the effective relative epsilon is also calculated for the selected structures. The operational frequency band is selected from 300 (THz) to 900 (THz).

• Periodical: Journal of Nano Research (Volume 46)
• Pages: 1-11
• DOI: https://doi.org/10.4028/www.scientific.net/JNanoR.46.1
• Online since: March 2017
• Authors: Amir Maghoul*, Ali Rostami, Samiyeh Matloub, Amin Pourrezaei
• Keywords: Core-Shell, Effective Relative Epsilon, Extinction Cross-Section, Gold Nanoparticle, Plasmon Polariton Resonance

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