Transferring self‐assembly liquid‐crystalline blue phase structure to polymers is emerging as a promising bottom‐up strategy in the nanofabrication of 3D photonic materials and devices. Here a polymer scaffold in blue phase I structure is fabricated with cubic symmetry and its potential application is demonstrated as an electrically tunable mirrorless laser by refilling the scaffold with laser dye‐doped nematic liquid crystal mixture. The templated blue phase exhibits immense thermal stability and sensitive responsive behavior to external electric fields with blueshift of the reflection band under negative bias voltage whereas redshift under positive bias. Moreover, bias‐polarity dependent bidirectional tuning of the laser emission with wavelength range of about 48 nm is achieved in the study. The nanoengineered 3D polymer scaffold with splendid electrical tunability might provide impetus for the preparation of functional hybrid materials and novel device architectures, which have diversified potential applications in reflective full‐color displays, tunable optical devices, and photonic integrated circuits.

中文翻译：

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用于可调谐激光器应用的纳米工程3D蓝相聚合物支架中光子带隙的偏置与极化率有关的双向调制。

在3D光子材料和设备的纳米制造中，将自组装液晶蓝相结构转移到聚合物中已成为一种有希望的自下而上的策略。此处以立方对称的方式制造了呈蓝相I结构的聚合物支架，并通过向支架中填充激光染料掺杂的向列液晶混合物，证明了其潜在的应用作为电可调无镜激光器。模板化的蓝相表现出巨大的热稳定性和对外部电场的敏感响应行为，在负偏置电压下反射带发生蓝移，而在正偏置下发生红移。此外，在研究中实现了波长范围约为48 nm的激光发射的偏极化相关的双向调谐。