Spatially structured UV–visible light fields generate topographic modulations on the surface of films of azobenzene‐containing polymers. The geometry of the surface reliefs depends on the spatiotemporal distribution of light over the sample. If multistep sequential irradiations are used, even illumination configurations as simple as the interference of two linearly polarized beams produce complex surface textures. This is the case of the quasicrystal geometries, obtainable as the superposition of multiple sinusoidal surface relief gratings oriented in different directions over the surface. The quantitative relief design would require a comprehensive theoretical description of the light‐induced relief formation mechanism, which is still elusive for azopolymers. Here, despite limiting the description at a phenomenological level, the deterministic design of the quasicrystal surface reliefs obtained in sequential light exposures of an azopolymer film is demonstrated. The model provides an excellent agreement between simulated and experimental relief textures, predicting also the dependence of relief structural features on illumination parameters as the number of exposure steps and the beam interference angle. The deterministic texture design allows the controlled tailoring of surface functionalities related to the relief geometry like light diffraction properties of the samples, which are here exploited to manipulate, split, and trap diffracted light.

中文翻译：

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偶氮聚合物薄膜上准晶体表面起伏光栅的确定性实现

空间结构化的UV-可见光场在含偶氮苯的聚合物薄膜表面上产生形貌调制。表面浮雕的几何形状取决于样品上光的时空分布。如果使用多步顺序照射，则即使是简单的照明配置（如两个线性偏振光束的干涉）也会产生复杂的表面纹理。准晶体的几何形状就是这种情况，可以通过在表面上以不同方向定向的多个正弦表面起伏光栅的叠加获得。定量浮雕设计需要对光诱导浮雕形成机理进行全面的理论描述，但对于偶氮聚合物仍然难以捉摸。在这里，尽管将描述限制在现象学层面，证明了在偶氮聚合物膜的连续曝光中获得的准晶体表面浮雕的确定性设计。该模型在模拟浮雕纹理和实验浮雕纹理之间提供了极好的一致性，还预测了浮雕结构特征对照明参数的依赖性，例如曝光步骤数和光束干涉角。确定性纹理设计允许对与浮雕几何形状相关的表面功能（例如样品的光衍射特性）进行可控的剪裁，此处可利用这些功能来操纵，分离和捕获衍射光。还预测浮雕结构特征对照明参数的依赖性，例如曝光步骤的数量和光束干涉角。确定性纹理设计允许对与浮雕几何形状相关的表面功能（例如样品的光衍射特性）进行可控的剪裁，此处可利用这些功能来操纵，分离和捕获衍射光。还预测浮雕结构特征对照明参数的依赖性，例如曝光步骤的数量和光束干涉角。确定性纹理设计允许对与浮雕几何形状相关的表面功能（例如样品的光衍射特性）进行可控的剪裁，此处可利用这些功能来操纵，分离和捕获衍射光。