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- Circular dichroism in biological photonic crystals and cubic chiral nets
- Saba, M.; Thiel, M.; Turner, M. D.; Hyde, S. T.; Gu, M.; Grosse-Brauckmann, K.; Neshev, D. N.; Mecke, K.; Schroder-Turk, G. E.
- 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 I4132 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.
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics. Centre for Ultrahigh Bandwidth Devices for Optical Systems
- Physical Review Letters, Vol. 106, no. 10 (Mar 2011), article no. 103902
- Publication year
- FOR Code(s)
- 01 Mathematical Sciences; 02 Physical Sciences; 09 Engineering
- Band gaps; Butterfly wing scales; Chiral networks; Circular dichroism; Photonic crystals; Surfaces
- American Physical Society
- Publisher URL
- Copyright © 2011 American Physical Society. Published version of the paper reproduced here in accordance with the copyright policy of the publisher.
- Full text
- Peer reviewed