Abstract
Engineering the helical structure of chiral photonic materials in three dimensions remains a challenge. 3D helix engineered photonic materials are fabricated by local stratification in a photopolymerizable chiral nematic liquid crystal. The obtained chiral photonic materials reflect both handedness of circular polarized light and show super-reflectivity. Simulations match the experimentally observed photonic properties and reveal a distorted helical structure. 3D engineered polymer films can be made that reflect both left- and right handed circular and linear polarized light dependent and exhibit a changing color contrast upon altering the polarization of incident light. Hence, these 3D engineered photonic materials are of interest for new and emerging applications ranging from anti-counterfeit labels and data encryption to aesthetics and super-reflective films.
Original language | English |
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Article number | 1903120 |
Number of pages | 7 |
Journal | Advanced Materials |
Volume | 31 |
Issue number | 33 |
DOIs | |
Publication status | Published - 2019 |
Keywords
- 3D helical structures
- chiral nematic liquid crystals
- photonic structures
- polymers
- super-reflectivity