Improving the homogeneity of diffraction based colours by fabricating periodic patterns with gradient spatial period using Direct Laser Interference Patterning

Improving the homogeneity of diffraction based colours by fabricating periodic patterns with gradient spatial period using Direct Laser Interference Patterning

Abstract This study focuses on the development of a strategy to produce periodic structures with a variable spatial period for increasing the homogeneity of structural colours by means of direct laser interference patterning. Using a four-beam interference configuration, hole-like periodic arrays ar...

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Autores principales: Bogdan Voisiat, Wei Wang, Max Holzhey, Andrés Fabián Lasagni
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2019
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Acceso en línea:https://doaj.org/article/fd77e1f9b24c40d49dda99b7151a8545
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spelling oai:doaj.org-article:fd77e1f9b24c40d49dda99b7151a85452021-12-02T15:09:38ZImproving the homogeneity of diffraction based colours by fabricating periodic patterns with gradient spatial period using Direct Laser Interference Patterning10.1038/s41598-019-44212-42045-2322https://doaj.org/article/fd77e1f9b24c40d49dda99b7151a85452019-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-44212-4https://doaj.org/toc/2045-2322Abstract This study focuses on the development of a strategy to produce periodic structures with a variable spatial period for increasing the homogeneity of structural colours by means of direct laser interference patterning. Using a four-beam interference configuration, hole-like periodic arrays are produced on stainless steel with a 70 ps pulsed laser source operating at 532 nm laser wavelength. The laser processing parameters are optimised for obtaining patterns with the highest possible diffraction efficiency and thus showing the highest possible colour intensity. A model for calculating the required spatial period to obtain a defined colour under specific conditions of illumination and observation angles is presented. A very good agreement between the captured structural colour spectrum and the real visible spectrum of light was obtained. In addition, a strategy for mixing holographic colours, in particular for obtaining the white colour is developed. Finally, the developed model is successfully integrated into machine software, in order to automatically process images that exhibit required colours at certain viewing conditions. The produced patterns are characterised using confocal microscopy and the efficiency of the first diffraction order was measured by optical spectroscopy.Bogdan VoisiatWei WangMax HolzheyAndrés Fabián LasagniNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-9 (2019)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Bogdan Voisiat
Wei Wang
Max Holzhey
Andrés Fabián Lasagni
Improving the homogeneity of diffraction based colours by fabricating periodic patterns with gradient spatial period using Direct Laser Interference Patterning
description Abstract This study focuses on the development of a strategy to produce periodic structures with a variable spatial period for increasing the homogeneity of structural colours by means of direct laser interference patterning. Using a four-beam interference configuration, hole-like periodic arrays are produced on stainless steel with a 70 ps pulsed laser source operating at 532 nm laser wavelength. The laser processing parameters are optimised for obtaining patterns with the highest possible diffraction efficiency and thus showing the highest possible colour intensity. A model for calculating the required spatial period to obtain a defined colour under specific conditions of illumination and observation angles is presented. A very good agreement between the captured structural colour spectrum and the real visible spectrum of light was obtained. In addition, a strategy for mixing holographic colours, in particular for obtaining the white colour is developed. Finally, the developed model is successfully integrated into machine software, in order to automatically process images that exhibit required colours at certain viewing conditions. The produced patterns are characterised using confocal microscopy and the efficiency of the first diffraction order was measured by optical spectroscopy.
format article
author Bogdan Voisiat
Wei Wang
Max Holzhey
Andrés Fabián Lasagni
author_facet Bogdan Voisiat
Wei Wang
Max Holzhey
Andrés Fabián Lasagni
author_sort Bogdan Voisiat
title Improving the homogeneity of diffraction based colours by fabricating periodic patterns with gradient spatial period using Direct Laser Interference Patterning
title_short Improving the homogeneity of diffraction based colours by fabricating periodic patterns with gradient spatial period using Direct Laser Interference Patterning
title_full Improving the homogeneity of diffraction based colours by fabricating periodic patterns with gradient spatial period using Direct Laser Interference Patterning
title_fullStr Improving the homogeneity of diffraction based colours by fabricating periodic patterns with gradient spatial period using Direct Laser Interference Patterning
title_full_unstemmed Improving the homogeneity of diffraction based colours by fabricating periodic patterns with gradient spatial period using Direct Laser Interference Patterning
title_sort improving the homogeneity of diffraction based colours by fabricating periodic patterns with gradient spatial period using direct laser interference patterning
publisher Nature Portfolio
publishDate 2019
url https://doaj.org/article/fd77e1f9b24c40d49dda99b7151a8545
work_keys_str_mv AT bogdanvoisiat improvingthehomogeneityofdiffractionbasedcoloursbyfabricatingperiodicpatternswithgradientspatialperiodusingdirectlaserinterferencepatterning
AT weiwang improvingthehomogeneityofdiffractionbasedcoloursbyfabricatingperiodicpatternswithgradientspatialperiodusingdirectlaserinterferencepatterning
AT maxholzhey improvingthehomogeneityofdiffractionbasedcoloursbyfabricatingperiodicpatternswithgradientspatialperiodusingdirectlaserinterferencepatterning
AT andresfabianlasagni improvingthehomogeneityofdiffractionbasedcoloursbyfabricatingperiodicpatternswithgradientspatialperiodusingdirectlaserinterferencepatterning
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