Brilliant whiteness in shrimp from ultra-thin layers of birefringent nanospheres.
Biophotonics
Biophysics
Green photonics
Optical materials
Photonic crystals
Journal
Nature photonics
ISSN: 1749-4885
Titre abrégé: Nat Photonics
Pays: England
ID NLM: 101283276
Informations de publication
Date de publication:
2023
2023
Historique:
received:
20
10
2022
accepted:
24
02
2023
medline:
8
6
2023
pubmed:
8
6
2023
entrez:
8
6
2023
Statut:
ppublish
Résumé
A fundamental question regarding light scattering is how whiteness, generated from multiple scattering, can be obtained from thin layers of materials. This challenge arises from the phenomenon of optical crowding, whereby, for scatterers packed with filling fractions higher than ~30%, reflectance is drastically reduced due to near-field coupling between the scatterers. Here we show that the extreme birefringence of isoxanthopterin nanospheres overcomes optical crowding effects, enabling multiple scattering and brilliant whiteness from ultra-thin chromatophore cells in shrimp. Strikingly, numerical simulations reveal that birefringence, originating from the spherulitic arrangement of isoxanthopterin molecules, enables intense broadband scattering almost up to the maximal packing for random spheres. This reduces the thickness of material required to produce brilliant whiteness, resulting in a photonic system that is more efficient than other biogenic or biomimetic white materials which operate in the lower refractive index medium of air. These results highlight the importance of birefringence as a structural variable to enhance the performance of such materials and could contribute to the design of biologically inspired replacements for artificial scatterers like titanium dioxide.
Identifiants
pubmed: 37287680
doi: 10.1038/s41566-023-01182-4
pii: 1182
pmc: PMC10241642
doi:
Types de publication
Journal Article
Langues
eng
Pagination
485-493Informations de copyright
© The Author(s) 2023.
Déclaration de conflit d'intérêts
Competing interestsThe authors declare no competing interests.
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