Journal
OPTICS EXPRESS
Volume 19, Issue 4, Pages 3144-3154Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.19.003144
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Funding
- EPSRC (UK) [EP/G060649/1, EP/E040241]
- EPSRC [EP/G060649/1, EP/H027130/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G060649/1, EP/H027130/1] Funding Source: researchfish
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We demonstrate the production of high-quality polymer opal fibers in an industrially-scalable process. These fibers exhibit structural color, based on the self-assembly of sub-micron core-shell particles, with a spectrum which is stretch-tunable across the visible region. The internal substructure and ordering of fibers, as inferred from variations in spectral bandwidth, is studied using dark-field microscopy. We employ a granular model to examine flow and shear forces during the extrusion process, and the effects on particle ordering. In both theory and experiment, a concentric zone of the fiber near the exposed surface develops particularly strong structural color. Such elastically-tuned structurally colored fibers are of interest for many applications. (C)2011 Optical Society of America
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