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Invited Article: Bragg stacks with tailored disorder create brilliant whiteness

  • The scales of white beetles strongly scatter light within a thin disordered network of chitin filaments. There is no comparable artificial material achieving such a high scat- tering strength within a thin layer of low refractive index material. Several analyses investigated the scattering but could not explain the underlying concept. Here a model system is described, which has the same optical properties as the white beetles’ scales in the visible wavelength range. With some modification, it also explains the behavior of the structures in the near infrared range. The comparison of the original structure and the model system is done by finite-difference time-domain calculations. The calcula- tions show excellent agreement with the beetles’ scales with respect to the reflectance, the time-of-flight, and the intensity distribution in the far-field.

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Author:Dominic MeiersORCiD, Marie-Christin Heep, Georg von FreymannORCiD
URN (permanent link):urn:nbn:de:hbz:386-kluedo-56643
Parent Title (English):APL Photonics
Document Type:Article
Language of publication:English
Publication Date:2019/07/05
Year of Publication:2018
Publishing Institute:Technische Universität Kaiserslautern
Date of the Publication (Server):2019/07/08
Tag:Cyphochilus; biomimetics; tailored disorder; white beetles
Issue:Volume 3, Issue 10
Number of page:6
Faculties / Organisational entities:Fachbereich Physik
DDC-Cassification:5 Naturwissenschaften und Mathematik / 530 Physik
Licence (German):Zweitveröffentlichung