Abstract
Chiral-nematic glassy liquid crystals (GLCs) are of interest because of their unique supramolecular structure and associated optical properties. However, the constant-pitch films produced so far have a bandwidth limited to less than 100 nm in the visible. The introduction of a pitch gradient, indicated by theory to increase bandwidth, is reported here to be achieved by the generation of a pitch gradient in the mesomorphic fluid state and subsequent thermal quenching, freezing in the pitch gradient. An increase of polarization bandwidth by a factor of 2.4 was found.
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