Laser-written colours on silver

optical effect of alumina coating

verfasst von

Jean Michel Guay, Antonino Calà Lesina, Graham Killaire, Peter G. Gordon, Choloong Hahn, Sean T. Barry, Lora Ramunno, Pierre Berini, Arnaud Weck

Abstract

In this paper we discuss the optical response of laser-written plasmonic colours on silver coated via the atomic layer deposition of alumina. These colours are due to nanoparticles distributed on a flat surface and on a surface with periodic topographical features (i.e. ripples). The colours are observed to shift with increasing alumina film thickness. The colours produced by surfaces with ripples recover their original vibrancy and hue after the deposition of film of thickness ~60 nm, while colours arising from flat surfaces gradually fade and never recover. Analysis of the surfaces identifies periodic topographical features to be responsible for this behaviour. Finite-difference time-domain simulations unravel the role played by the alumina thickness in colour formation and confirm the rotations and recovery of colours for increasing alumina thickness. The coloured surfaces were evaluated for applications in colourimetric and radiometric sensing showing large sensitivities of up to 3.06/nm and 3.19 nm/nm, respectively. The colourimetric and radiometric sensitivities are observed to be colour dependent.

Externe Organisation(en)

University of Ottawa
Carleton University

Typ

Artikel

Journal

Nanophotonics

Band

8

Seiten

807-822

Anzahl der Seiten

16

ISSN

2192-8606

Publikationsdatum

04.03.2019

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Biotechnologie, Elektronische, optische und magnetische Materialien, Atom- und Molekularphysik sowie Optik, Elektrotechnik und Elektronik

Elektronische Version(en)

https://doi.org/10.1515/nanoph-2018-0202 (Zugang: Offen)