TY  - JOUR
AU  - Wilts, B.D.
AU  - Michielsen, K.
AU  - De Raedt, H.
AU  - Stavenga, D.G.
TI  - Hemispherical Brillouin zone imaging of a diamond-type biological photonic crystal
JO  - Interface
VL  - 9
SN  - 1742-5689
CY  - London
PB  - The Royal Society
M1  - PreJuSER-21163
SP  - 1609 - 1614
PY  - 2012
N1  - Record converted from VDB: 12.11.2012
AB  - The brilliant structural body colours of many animals are created by three-dimensional biological photonic crystals that act as wavelength-specific reflectors. Here, we report a study on the vividly coloured scales of the diamond weevil, Entimus imperialis. Electron microscopy identified the chitin and air assemblies inside the scales as domains of a single-network diamond (Fd3m) photonic crystal. We visualized the topology of the first Brillouin zone (FBZ) by imaging scatterometry, and we reconstructed the complete photonic band structure diagram (PBSD) of the chitinous photonic crystal from reflectance spectra. Comparison with calculated PBSDs indeed showed a perfect overlap. The unique method of non-invasive hemispherical imaging of the FBZ provides key insights for the investigation of photonic crystals in the visible wavelength range. The characterized extremely large biophotonic nanostructures of E. imperialis are structurally optimized for high reflectance and may thus be well suited for use as a template for producing novel photonic devices, e.g. through biomimicry or direct infiltration from dielectric material.
KW  - Animals
KW  - Beetles: chemistry
KW  - Beetles: ultrastructure
KW  - Chitin: chemistry
KW  - Chitin: ultrastructure
KW  - Microscopy, Electron
KW  - Nanostructures: chemistry
KW  - Nanostructures: ultrastructure
KW  - Pigmentation
KW  - Chitin (NLM Chemicals)
LB  - PUB:(DE-HGF)16
C6  - pmid:22188768
C2  - pmc:PMC3367810
UR  - <Go to ISI:>//WOS:000304437400017
DO  - DOI:10.1098/rsif.2011.0730
UR  - https://juser.fz-juelich.de/record/21163
ER  -