Computer-generated holograms for complex surface reliefs on azopolymer films
Computer-generated holograms for complex surface reliefs on azopolymer films
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DOI：
10.1038/s41598-019-43256-w
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发表时间：
2019-05-01
影响因子：
4.6
通讯作者：
Ambrosio, Antonio
中科院分区：
文献类型：
--
作者：
Oscurato, Stefano Luigi;Salvatore, Marcella;Ambrosio, Antonio
在含偶氮苯聚合物膜表面观察到的光驱动表面结构化遵循照明光图案的光场分布，即光偏振态和强度分布。因此，精确操纵照明强度图案的能力可以在偶氮聚合物膜表面上可获得的复杂光诱导表面纹理的范围内提供新的水平。在这方面，数字全息，基于计算全息（CGH）的原则，并实际上实现了一个多功能的液晶空间光调制器的装置，可以代表一个独特的实验工具，在该领域的光致质量迁移的偶氮材料。在目前的工作中，我们证明了精确控制的功能和质量的复杂的光图案通过CGH产生的，以诱导任意复杂的表面浮雕到偶氮聚合物的表面上的可能性。本文的研究结果为光响应偶氮聚合物薄膜在表面工程、生物学和光子学等领域的应用提供了新的思路。
The light-driven superficial structuration observed on the surface of films of azobenzene-containing polymers follows the optical field distribution of the illuminating light pattern, i.e. the light polarization state and the intensity distribution. The ability to precisely manipulate the illuminating intensity pattern can hence provide a new level in the range of complex light-induced superficial textures accessible onto azopolymer film surfaces. In this respect, digital holography, based on the principles of the Computer-Generated Holograms (CGHs), and actually implemented by means of a versatile liquid crystal spatial light modulator, can represent a unique experimental tool in the field of the light-induced mass migration in azo-materials. In the present work, we demonstrate the possibility to precisely control the features and the quality of complex light patterns generated through CGHs in order to induce arbitrarily complex surface reliefs onto the surface of an azopolymer. The results shown here can potentially broaden the range of possible applications of photo-responsive azopolymer films in the fields of surface engineering, biology and photonics.