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Proceedings Paper

Chiral photonic crystals with four-fold symmetry: band structure and S-parameters of eight-fold intergrown Gyroid nets
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Paper Abstract

The Single Gyroid, or srs, nanostructure has attracted interest as a circular-polarisation sensitive photonic material. We develop a group theoretical and scattering matrix method, applicable to any photonic crystal with symmetry I432, to demonstrate the remarkable chiral-optical properties of a generalised structure called 8-srs, obtained by intergrowth of eight equal-handed srs nets. Exploiting the presence of four-fold rotations, Bloch modes corresponding to the irreducible representations E_ and E+ are identified as the sole and non-interacting transmission channels for right- and left-circularly polarised light, respectively. For plane waves incident on a finite slab of the 8-srs, the reflection rates for both circular polarisations are identical for all frequencies and transmission rates are identical up to a critical frequency below which scattering in the far field is restricted to zero grating order. Simulations show the optical activity of the lossless dielectric 8-srs to be large, comparable to metallic metamaterials, demonstrating its potential as a nanofabricated photonic material.

Paper Details

Date Published: 7 December 2013
PDF: 9 pages
Proc. SPIE 8923, Micro/Nano Materials, Devices, and Systems, 89233T (7 December 2013); doi: 10.1117/12.2033820
Show Author Affiliations
Matthias Saba, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Mark D. Turner, Swinburne Univ. of Technology (Australia)
Min Gu, Swinburne Univ. of Technology (Australia)
Klaus Mecke, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Gerd E. Schröder-Turk, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)

Published in SPIE Proceedings Vol. 8923:
Micro/Nano Materials, Devices, and Systems
James Friend; H. Hoe Tan, Editor(s)

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