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@ARTICLE{Wilts:22534,
      author       = {Wilts, B.D. and Michielsen, K. and De Raedt, H. and
                      Stavenga, D.G.},
      title        = {{I}ridescence and spectral filtering of the gyroid photonic
                      crystals in {P}arides sesostris wing scales},
      journal      = {Interface Focus},
      volume       = {2},
      issn         = {2042-8898},
      address      = {London},
      publisher    = {Royal Society Publishing},
      reportid     = {PreJuSER-22534},
      pages        = {681 - 687},
      year         = {2012},
      note         = {We thank H. L. Leertouwer and A. J. M. Vey for cooperation,
                      three anonymous reviewers for constructive comments and the
                      Materials Science Group (Prof. J. Th. De Hosson, University
                      of Groningen) for providing SEM facilities. This study was
                      financially supported by AFOSR/EOARD (grant
                      FA8655-08-1-3012) and partially supported by NCF, The
                      Netherlands.},
      abstract     = {The cover scales on the wing of the Emerald-patched
                      Cattleheart butterfly, Parides sesostris, contain
                      gyroid-type biological photonic crystals that brightly
                      reflect green light. A pigment, which absorbs maximally at
                      approximately 395 nm, is immersed predominantly throughout
                      the elaborate upper lamina. This pigment acts as a long-pass
                      filter shaping the reflectance spectrum of the underlying
                      photonic crystals. The additional effect of the filtering is
                      that the spatial distribution of the scale reflectance is
                      approximately angle-independent, leading to a stable wing
                      pattern contrast. The spectral tuning of the original
                      reflectance is verified by photonic band structure
                      modelling.},
      keywords     = {J (WoSType)},
      cin          = {JSC},
      ddc          = {570},
      cid          = {I:(DE-Juel1)JSC-20090406},
      pnm          = {Scientific Computing (FUEK411) / 411 - Computational
                      Science and Mathematical Methods (POF2-411)},
      pid          = {G:(DE-Juel1)FUEK411 / G:(DE-HGF)POF2-411},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000308239700018},
      pubmed       = {pmid:24098853},
      doi          = {10.1098/rsfs.2011.0082},
      url          = {https://juser.fz-juelich.de/record/22534},
}