Circular dichroism in biological photonic crystals and cubic chiral nets.
Phys Rev Lett
; 106(10): 103902, 2011 Mar 11.
Article
em En
| MEDLINE
| ID: mdl-21469792
ABSTRACT
Nature provides impressive examples of chiral photonic crystals, with the notable example of the cubic so-called srs network (the label for the chiral degree-three network modeled on SrSi2) or gyroid structure realized in wing scales of several butterfly species. By a circular polarization analysis of the band structure of such networks, we demonstrate strong circular dichroism effects The butterfly srs microstructure, of cubic I4(1)32 symmetry, shows significant circular dichroism for blue to ultraviolet light, that warrants a search for biological receptors sensitive to circular polarization. A derived synthetic structure based on four like-handed silicon srs nets exhibits a large circular polarization stop band of a width exceeding 30%. These findings offer design principles for chiral photonic devices.
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Bases de dados:
MEDLINE
Assunto principal:
Asas de Animais
/
Dicroísmo Circular
/
Fótons
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Alemanha