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Figure 5. (A) Dynamic FRET systems within the helical superstructures of CLCs; (B) Potential applications in information encryption using multifunctional CLCs in PMMA microtube. Reproduced with permission from^[53]. Copyright 2023, Springer Nature; (C) Schematic illustrations of CPL signal inversion driven by UV (365 nm) light without CLC superstructure change, where “L” denotes left circular polarization and “R” denotes right circular polarization; (D) The schematic diagram of information coding using the NLC-KG, CLC-KG, and CLC-KGNR-0.5 system. Reproduced with permission from^[54]. Copyright 2024, Wiley-VCH. GmbH. FRET: Förster Resonance Energy Transfer; CLC: cholesteric liquid crystal; PMMA: poly(methyl methacrylate); CPL: circularly polarized luminescence; UV: ultraviolet.