20.500.12556/RUL-160775 Electro-optic response of polymer-stabilized cholesteric liquid crystals with different polymer concentrations Polymer-stabilized cholesteric liquid crystals (PSCLCs) have emerged as promising candidates for one-dimensional photonic lattices that enable precise tuning of the photonic band gap (PBG). This work systematically investigates the effect of polymer concentrations on the AC electric field-induced tuning of the PBG in PSCLCs, in so doing it explores a range of concentrations and provides new insights into how polymer concentration affects both the stabilization of cholesteric textures and the electro-optic response. We demonstrate that low polymer concentrations (≈3 wt. %) cause a blue shift in the short wavelength band edge, while high concentrations (≈10 wt. %) lead to a contraction and deterioration of the reflection band. Polarization optical microscopy was conducted to confirm the phase transition induced by the application of an electric field. The observations confirm that increased polymer concentration stabilizes the cholesteric texture. Particularly, the highly desired fingerprint texture was stabilized in a sample with 10 wt. % of the polymer, whereas it was unstable for lower polymer concentrations. Additionally, higher polymer concentrations also improved the dissymmetry factor and stability of the lasing emission, with the dissymmetry factor reaching the value of around 2 for samples with 10 wt. % of polymer additive. Our results provide valuable comprehension into the design of advanced PSCLC structures with tunable optical properties, enhancing device performance and paving the way for innovative photonic applications. liquid crystals polymers optics tekoči kristali polimeri optika true false true Angleški jezik Slovenski jezik Članek v reviji 2024-09-04 12:51:52 2024-09-04 12:51:52 2025-08-08 13:20:35 0000-00-00 00:00:00 2024 0 0 18 str. iss. 17, art. no. 2436 Vol. 16 2024 0000-00-00 Zaloznikova NiDoloceno NiDoloceno 0000-00-00 0000-00-00 2024-08-28 538.9 2073-4360 10.3390/polym16172436 206330371 polymers-16-02436.pdf polymers-16-02436.pdf 1 E1B1F236D6CD74DD1E90F97C8237A807 ffcd2d8c122ad307ea07c35e6f71b07a5625c6fdcae81a6d0c4985e4f0b4bf70 67d2e5aa-6aad-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=189557 https://www.mdpi.com/2073-4360/16/17/2436 0 6fbb0ba2-6aad-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=189558 Fakulteta za matematiko in fiziko 0 0 0