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Updated: Apr 17, 2026

Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics

Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics

Published on: May 28, 2016

Material effects on V-nanoantenna performance.

S K Earl¹, D E Gómez, T D James

¹School of Physics, The University of Melbourne, Victoria 3010, Australia. s.earl@student.unimelb.edu.au.

|February 12, 2015

Summary

This summary is machine-generated.

Aluminum plasmonic antennas on silicon substrates are investigated. The silicon oxide layer significantly impacts resonances, while the aluminum oxide layer has minimal effect, leading to narrower blue spectrum resonances.

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Area of Science:

Materials Science
Nanotechnology
Optics

Background:

Aluminum plasmonics offer cost-effectiveness and stability due to a self-passivating oxide layer.
Previous studies focused on glass substrates, leaving the effect of high-refractive index substrates on aluminum nanostructures under-explored.

Purpose of the Study:

To investigate the influence of a silicon substrate's native oxide layer on the plasmon resonances of aluminum V-shaped antennas.
To analyze the impact of aluminum's interband transition on plasmonic behavior.

Main Methods:

Fabrication and experimental characterization of aluminum V-shaped antennas on silicon.
Numerical simulations comparing models with and without substrate/passivation layers.
Computational analysis of aluminum's 1.5 eV interband transition effects.

Main Results:

The aluminum passivation layer minimally affects antenna resonances.
Accurate numerical modeling requires including the silicon substrate's native oxide layer.
Aluminum's interband transition narrows blue-spectrum resonances.

Conclusions:

The silicon substrate's oxide layer is crucial for accurate modeling of aluminum plasmonic antennas.
Understanding these substrate effects is vital for designing stable and efficient aluminum-based plasmonic devices.