Holographic Recording and Hierarchical Surface Patterning on Periodic Submicrometer Pillar Arrays of Azo Molecular Glass via Polarized Light Irradiation
Holographic Recording and Hierarchical Surface Patterning on Periodic Submicrometer Pillar Arrays of Azo Molecular Glass via Polarized Light Irradiation
复制标题
通过偏振光照射偶氮分子玻璃周期性亚微米柱阵列的全息记录和分层表面图案
DOI：
10.1002/adfm.201802506
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发表时间：
2018-08-22
影响因子：
19
通讯作者：
Wang, Xiaogong
中科院分区：
文献类型：
--
作者：
Hsu, Chungen;Xu, Zeda;Wang, Xiaogong
以光响应型偶氮分子玻璃(IA-CHOL)为基材，采用弹性体聚(二甲基硅氧烷)(PDMS)模式，采用软光刻热压工艺制备了周期性亚微米级柱阵。通过对叠加电波的局部振幅和偏振的响应，使每个亚微米级的柱体发生形变，在IA-Chol柱体阵列上记录光学全息图。当干涉图由两束偏振方向相反的偏振光束形成时，记录的干涉图主要反映了干涉波的偏振状态随空间位相差的变化。当两个具有相同线偏振的平面波叠加时，其中的偏振方向与写入光束几乎相同，叠加后的电波的强度变化被记录为柱子阵列随相位变化而在空间上的变化。通过干涉波的强度调制和偏振调制，成功地形成了具有不同层次构型的各种有序表面图案。这种方法不仅可以直观地显示全息图捕获的相干光的强度和偏振，而且为制作各种复杂的表面图案提供了一个强大的平台。亚微米级柱阵也可用于记录偏振全息图，并在衍射点上用参考光再现图像。
Periodic submiocrometer pillar arrays are fabricated from a photoresponsive azo molecular glass (IA-Chol) by soft-lithographic hot embossing with elastomeric poly(dimethylsiloxane) (PDMS) modes. Through deformation of each submicrometer-sized pillar in response to the local amplitude and polarization of the superimposed electric waves, optical holograms are recorded on the IA-Chol pillar arrays. When the interference pattern is formed by two polarized beams with opposite-circular polarizations, the recorded patterns mainly reflect the polarization state variations with spatial phase difference of the interfering waves. When two plane waves with the same linear polarizations are superimposed, where the polarization direction is almost the same as the writing beams, the intensity variation of the superimposed electric waves is recorded by the pillar arrays changing spatially with the phase variations. Various ordered surface patterns with distinct hierarchical configurations are successfully developed by the intensity and polarization modulations of the interfering waves. This approach not only allows to directly visualize the intensity and polarization of the coherent light captured by the holograms, but also provides a powerful platform to fabricate various complex surface patterns. The submicrometer pillar arrays can also be used to record polarization hologram and the images are reconstructed by reference light in diffracted spots.