TY - JOUR

T1 - Laser-written colours on silver

T2 - optical effect of alumina coating

AU - Guay, Jean Michel

AU - Calà Lesina, Antonino

AU - Killaire, Graham

AU - Gordon, Peter G.

AU - Hahn, Choloong

AU - Barry, Sean T.

AU - Ramunno, Lora

AU - Berini, Pierre

AU - Weck, Arnaud

N1 - Funding information:: We acknowledge the Royal Canadian Mint, the Natural Sciences and Engineering Council of Canada, the Canada Research Chairs program, the Southern Ontario Smart Computing Innovation Platform (SOSCIP), and SciNet. We would also like to acknowledge Dr. Jaspreet Walia, Dr. Fabio Variola and Maël Chow-Cloutier at the University of Ottawa. We acknowledge the Royal Canadian Mint, the Natural Sciences and Engineering Council of Canada, the Canada Research Chairs program, the Southern Ontario Smart Computing Innovation Platform (SOSCIP), and SciNet. We would also like to acknowledge Dr. Jaspreet Walia, Dr. Fabio Variola and Mael Chow-Cloutier at the University of Ottawa.

PY - 2019/3/4

Y1 - 2019/3/4

N2 - 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.

AB - 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.

KW - Colour sensors

KW - Computional Nanophotonics

KW - Nanostructures

KW - Plasmonic colouring

KW - Thin Films

UR - http://www.scopus.com/inward/record.url?scp=85062849186&partnerID=8YFLogxK

U2 - 10.1515/nanoph-2018-0202

DO - 10.1515/nanoph-2018-0202

M3 - Article

AN - SCOPUS:85062849186

VL - 8

SP - 807

EP - 822

JO - Nanophotonics

JF - Nanophotonics

SN - 2192-8606

IS - 5

ER -