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

M. Saba; M.D. Turner; M. Gu; K. Mecke; G.E. Schröder-Turk

doi:10.1117/12.2033820

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

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

M. Saba, M.D. Turner, M. Gu, K. Mecke and G.E. Schröder-Turk

Micro/Nano Materials, Devices, and Systems, Vol.8923

SPIE: Micro/Nano Materials, Devices, and Systems (Melbourne, Australia, 09/12/2013–11/12/2013)

2013

DOI: https://doi.org/10.1117/12.2033820

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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.

Details

Title: Chiral photonic crystals with four-fold symmetry: Band structure and S-parameters of eight-fold intergrown Gyroid nets
Authors/Creators: M. Saba (Author/Creator)
M.D. Turner (Author/Creator)
M. Gu (Author/Creator)
K. Mecke (Author/Creator)
G.E. Schröder-Turk (Author/Creator)
Publication Details: Micro/Nano Materials, Devices, and Systems, Vol.8923
Conference: SPIE: Micro/Nano Materials, Devices, and Systems (Melbourne, Australia, 09/12/2013–11/12/2013)
Identifiers: 991005542782907891
Murdoch Affiliation: Murdoch University
Language: English
Resource Type: Conference paper

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