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Hielscher J, Pouya C, Vukusic P, et al. Harmonic distortions enhance circular dichroism of dielectric single gyroids. Opt Express. 2017;25(5):5001-5017doi: 10.1364/OE.25.005001.
Hielscher, J., Pouya, C., Vukusic, P., & Schröder-Turk, G. E. (2017). Harmonic distortions enhance circular dichroism of dielectric single gyroids. Optics express, 25(5), 5001-5017. https://doi.org/10.1364/OE.25.005001
Hielscher, Johannes, et al. "Harmonic distortions enhance circular dichroism of dielectric single gyroids." Optics express vol. 25,5 (2017): 5001-5017. doi: https://doi.org/10.1364/OE.25.005001
Hielscher J, Pouya C, Vukusic P, Schröder-Turk GE. Harmonic distortions enhance circular dichroism of dielectric single gyroids. Opt Express. 2017 Mar 06;25(5):5001-5017. doi: 10.1364/OE.25.005001. PMID: 28380767.
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Opt Express. 2017 Mar 06;25(5):5001-5017. doi: 10.1364/OE.25.005001.

Harmonic distortions enhance circular dichroism of dielectric single gyroids.

Optics express

Johannes Hielscher, Caroline Pouya, Peter Vukusic, Gerd E Schröder-Turk

PMID: 28380767 DOI: 10.1364/OE.25.005001

Abstract

The departure from strict periodic order in two-phase dielectric materials can offer properties that are otherwise inaccessible to perfectly ordered photonic crystals. Herewith, we investigate the circular dichroism of the single gyroid photonic crystal in the presence of spatial distortions. FDTD simulations and microwave transmission measurements on 3D-printed replicas show that certain harmonic long-wavelength spatial distortions ("sinusoidal chirp") nearly doubles the imbalance of the circular polarisation reflectances, as well as significantly strengthens polarisation-incoherent reflectance. The observed changes are partially rationalised by comparison with simpler distortion models (linear chirp and tetragonal deformation) of the Gyroid.

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