Generation of phase-only holograms by laser ablation of nanoparticulate ITO layers
Generation of phase-only holograms by laser ablation of nanoparticulate ITO layers
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DOI：
10.1088/2040-8978/16/12/125706
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发表时间：
2014-12-01
影响因子：
2.1
通讯作者：
Schmidt, M.
中科院分区：
文献类型：
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作者：
Baum, M.;Strauss, J.;Schmidt, M.
相位全息图提供了巨大的潜力。 g。用于激光束整形和成像应用。然而，这些结构的生成通常需要多步骤过程，这往往既耗时又昂贵，特别是在需要高质量结构的情况下。在这项工作中，我们展示了一种灵活且廉价的方法，该方法允许通过激光烧蚀 ITO 纳米颗粒层来生产二元纯相位全息图。由于这些层被烧蚀后没有残留物，因此可以实现精确定义的相移。虽然可以生成任意形状的结构，但可以调整 ITO 层厚度，以便自由调整所需波长的相移。在全息图生成的衍射图案中，我们观察到出色的零级抑制。
Phase holograms offer great potential e. g. for laser beam shaping and imaging applications. However, the generation of these structures typically requires multi-step processes which tend to be time-consuming and expensive, especially if high-quality structures are required. In this work we demonstrate a flexible and inexpensive method which allows for the production of binary phase-only holograms by laser ablation of ITO nanoparticle layers. Since these layers are ablated free of residues, accurately defined phase shifts can be achieved. While arbitrarily shaped structures can be generated, the ITO layer thickness can be adjusted in order to freely tune the phase shift for the desired wavelength. In the diffraction patterns generated by the holograms we observed an excellent zero order suppression.