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Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles

Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles

Published on: March 2, 2016

Enhanced Third-Harmonic Generation from a Metal/Semiconductor Core/Shell Hybrid Nanostructure.

Omri Bar-Elli¹, Eran Grinvald¹, Noga Meir¹

¹Department of Physics of Complex Systems, Weizmann Institute of Science , Rehovot 76100, Israel.

|July 22, 2015

Summary

Shape-controlled gold/copper oxide core/shell nanostructures significantly boost nonlinear optical processes. These nanostructures enhance third-harmonic scattering by tuning plasmon resonance and leveraging excitonic states.

Keywords:

core/shell nanoparticles plasmonics third-harmonic generation

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Area of Science:

Nanophotonics
Materials Science
Nonlinear Optics

Background:

Localized surface plasmon resonance in metal nanoparticles enhances nonlinear optical processes.
Core/shell nanostructures offer tunable optical properties.

Purpose of the Study:

To investigate the enhancement of third-harmonic scattering using shape-controlled gold/copper oxide core/shell nanostructures.
To explore the dual role of the semiconducting component in tuning plasmon resonance and providing excitonic enhancement.

Main Methods:

Fabrication of shape-controlled Au/Cu2O core/shell nanostructures.
Characterization of optical properties, focusing on third-harmonic scattering.
Analysis of plasmonic and excitonic contributions to the enhancement.

Main Results:

Demonstrated significant enhancement of third-harmonic scattering cross-section in Au/Cu2O core/shell nanostructures.
Showcased the ability to tune the gold plasmon resonance via the semiconducting component.
Observed resonant enhancement due to the excitonic states of the semiconductor.

Conclusions:

Core/shell nanostructures provide a route to further enhance nonlinear optical processes.
The semiconducting component plays a crucial role in optimizing plasmonic and excitonic effects.
Discussed the potential and limitations of metal/semiconductor core/shell systems for advanced optical applications.