Reproducing the hierarchy of disorder for Morpho-inspired, broad-angle color reflection

Bokwang Song*, Villads Egede Johansen, Ole Sigmund, Jung H Shin

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The scales of Morpho butterflies are covered with intricate, hierarchical ridge structures that produce a bright, blue reflection that remains stable across wide viewing angles. This effect has been researched extensively, and much understanding has been achieved using modeling that has focused on the positional disorder among the identical, multilayered ridges as the critical factor for producing angular independent color. Realizing such positional disorder of identical nanostructures is difficult, which in turn has limited experimental verification of different physical mechanisms that have been proposed. In this paper, we suggest an alternative model of inter-structural disorder that can achieve the same broad-angle color reflection, and is applicable to wafer-scale fabrication using conventional thin film technologies. Fabrication of a thin film that produces pure, stable blue across a viewing angle of more than 120 ° is demonstrated, together with a robust, conformal color coating.
Original languageEnglish
Article number46023
JournalScientific Reports
Volume7
Number of pages8
ISSN2045-2322
DOIs
Publication statusPublished - 2017

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