Date
Monday, May 3, 2021
Time
11:50 AM - 12:10 PM (EDT)
Name
WITHDRAWN - Plasmonic Color Generation by Embedding Metal Nanoparticles in a Dielectric Matrix
Speakers
Dermot Monaghan - Gencoa ltd
Description

J.A. Santiago1, I. Fernández-Martínez1, A. Wennberg1, V. Bellido-Gonález2, T. Sgrilli2, P. Killen2, *D. Monaghan2
1Nano4Energy SL, Madrid, Spain; 2Gencoa Ltd, Liverpool, United Kingdom
Recently, the high-temperature dewetting has proven to be a direct technique to manufacture multilayers of metallic nanostructures embedded in a dielectric matrix with high performance and low cost. Simply by adjusting the size and thickness of the metal nanoislands, narrow and highly-tunable resonances can be achieved, which is very advantageous compared to traditional approaches. In this way, a wide range of colors can be obtained, covering the visible spectrum. The small particle size results in a slight dependence on the angle of incidence of light, whereas its high anisotropy results in strong dichroism. The color can also be tuned through interference, simply by adding an ultra-thin metal film at a certain distance from the particle matrix. We present results of multilayers manufacturing to create film metamaterials with a wide range of colors. The metal nanostructures are composed of gold, silver, copper and their alloys embedded in dielectric matrices (SiO2 and TiO2) with individual thicknesses between 5 and 50 nm. The coatings will be deposited by the magnetron sputtering method assisted by HiPIMS. The structure and composition of the coatings will be characterized by SEM, while the optical characterization is carried out by measuring the absorbance, reflectance and spectroscopic ellipsometry.

Session Type
Optical Coatings