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University of Groningen
Brilliant camouflageWilts, Bodo D.; Michielsen, Kristel; Kuipers, Jeroen; de Raedt, Hans; Stavenga, Doekele
Published in:Proceedings of the Royal Society of London. Series B, Biological Sciences
DOI:10.1098/rspb.2011.2651
IMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if you wish to cite fromit. Please check the document version below.
Document VersionPublisher's PDF, also known as Version of record
Publication date:2012
Link to publication in University of Groningen/UMCG research database
Citation for published version (APA):Wilts, B. D., Michielsen, K., Kuipers, J., Raedt, H. D., & Stavenga, D. G. (2012). Brilliant camouflage:photonic crystals in the diamond weevil, Entimus imperialis. Proceedings of the Royal Society of London.Series B, Biological Sciences, 279(1738), 2524-2530. DOI: 10.1098/rspb.2011.2651
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Download date: 11-02-2018
Supplementary Material
Fig. S1. Scanning electron microscopy of single scales of E. imperialis. (a) A single, intact scale.
The upper side of the scale consists of a set of more or less parallel furrows (scale bar: 20 µm).
(b) SEM image of a cross-section showing tilted sheets with hexagonal symmetry (c.f. Fig. 2b;
scale bar: 2 µm).
Fig. S2. Imaging scatterometry with a narrow beam illumination of ~5° angular width. The
reflecting scattering pattern of a green (a) and an orange domain (b) has identical angular width,
corresponding to a near-ideal point spread function. The white-dashed circles indicate scattering
angles of 5°, 30°, 60° and 90°.
Fig. S3. Simulated scatterograms of (a) a simple primitive, (b) a diamond and (c) a gyroid PC,
oriented in (0 0 1) direction. The scatterograms are scaled so that the highest wavelength is 600
nm. The scatterograms are distinctly different in shape and spectral composition.
Fig. S4. Simulated photonic band structure diagram for a single-network diamond-type photonic
crystal (D surface, Fd3m) with a dielectric constant ε = 2.45 and a filling fraction of ~30 %
(t = -0.5) for the lowest six energy bands. The high symmetry points are given in canonical order.
Fig. S5. Refractive index dependency of the complete photonic band gap based on the single-
network diamond BPC with t = -0.5. The complete photonic band gap opens at n’/n ~ 2 (black
arrowhead). The inset indicates the position and the width of the bandgap.