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

Matthias Saba; Mark D. Turner; Min Gu; Klaus Mecke; Gerd E. Schröder-Turk

doi:10.1117/12.2033820

7 December 2013 Chiral photonic crystals with four-fold symmetry: band structure and S-parameters of eight-fold intergrown Gyroid nets

Matthias Saba, Mark D. Turner, Min Gu, Klaus Mecke, Gerd E. Schröder-Turk

Author Affiliations +

Proceedings Volume 8923, Micro/Nano Materials, Devices, and Systems; 89233T (2013) https://doi.org/10.1117/12.2033820
Event: SPIE Micro+Nano Materials, Devices, and Applications, 2013, Melbourne, Victoria, Australia

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.

Citation Download Citation

Matthias Saba, Mark D. Turner, Min Gu, Klaus Mecke, and Gerd E. Schröder-Turk "Chiral photonic crystals with four-fold symmetry: band structure and S-parameters of eight-fold intergrown Gyroid nets", Proc. SPIE 8923, Micro/Nano Materials, Devices, and Systems, 89233T (7 December 2013); https://doi.org/10.1117/12.2033820

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