Hybrid fluorescent cholesteric liquid crystalline (CLC) materials are representatives of “smart” soft matter, and are characterized by light emission that can be flexibly controlled by various external stimuli. This fact is due to the many possibilities for potential applications in the fields of photonics and optics stimulating design, and study of this type of hybrid materials. Here, we report on the optical and fluorescence properties of the hybrid CLC material based on a low-molecular-weight CLC matrix and CdSe/ZnS quantum dots (QDs) stabilized by LC diblock copolymers. The hybrid CLC material is characterized by the cholesteric phase in a wide temperature range, the high loading of QDs, and no QD aggregation. We demonstrate that the cholesteric stop band alters characteristics of the QD emission due to the resonance effect. This makes the polarization state and wavelength of the QD emission thermo- and angle-dependent. This work provides a way for the design of a wide range of field-controllable photonic devices for various applications.

中文翻译：

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液晶嵌段共聚物稳定的含 CdSe/ZnS 量子点的可控发光杂化荧光胆甾醇材料

杂化荧光胆甾型液晶（CLC）材料是“智能”软物质的代表，其特点是发光可以灵活地受各种外部刺激控制。这是由于在光子学和光学刺激设计领域的潜在应用以及对此类混合材料的研究具有许多可能性。在这里，我们报告了基于低分子量 CLC 基质和由 LC 二嵌段共聚物稳定的 CdSe/ZnS 量子点 (QD) 的混合 CLC 材料的光学和荧光特性。混合 CLC 材料的特点是在较宽的温度范围内具有胆甾相、QD 的高负载和无 QD 聚集。我们证明胆甾醇阻带由于共振效应改变了 QD 发射的特性。这使得 QD 发射的偏振态和波长与热和角度有关。这项工作为设计用于各种应用的各种场可控光子器件提供了一种方法。