Subnanometer imaging and controlled dynamical patterning of thermocapillary driven deformation of thin liquid films
Subnanometer imaging and controlled dynamical patterning of thermocapillary driven deformation of thin liquid films
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DOI：
10.1038/s41377-019-0190-6
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发表时间：
2019-08
期刊：
影响因子：
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通讯作者：
Shimon Rubin;Brandon Hong;Y. Fainman
中科院分区：
文献类型：
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作者：
Shimon Rubin;Brandon Hong;Y. Fainman
探索和控制决定液体电介质薄膜形貌的物理因素是物理学、应用数学和工程学研究领域的一个重要课题，也是许多技术进步的一个关键方面。液体介质薄膜形貌的可视化和局部厚度测量是表征和解释底层过程的重要工具。然而，通过标准光学方法实现相对于亚纳米厚度变化的高灵敏度是具有挑战性的。我们提出了一种组合成像和光学图案化投影平台，该平台能够光学诱导薄液体介电膜中的动态流动，并等离子体地解决由此产生的形貌和厚度的变化。特别是，我们采用流体中的热毛细效应作为一种新的基于热的方法来调谐等离子体共振和可视化薄液体介电膜中的动力学过程。所提出的结果表明，光诱导的热毛细流动可以形成和翻译液滴和创建压痕图案的需求，在薄的液体介电薄膜的亚波长厚度和等离子体显微镜可以像这些流体动力学过程与亚纳米的灵敏度沿着垂直方向。
Exploring and controlling the physical factors that determine the topography of thin liquid dielectric films are of interest in manifold fields of research in physics, applied mathematics, and engineering and have been a key aspect of many technological advancements. Visualization of thin liquid dielectric film topography and local thickness measurements are essential tools for characterizing and interpreting the underlying processes. However, achieving high sensitivity with respect to subnanometric changes in thickness via standard optical methods is challenging. We propose a combined imaging and optical patterning projection platform that is capable of optically inducing dynamical flows in thin liquid dielectric films and plasmonically resolving the resulting changes in topography and thickness. In particular, we employ the thermocapillary effect in fluids as a novel heat-based method to tune plasmonic resonances and visualize dynamical processes in thin liquid dielectric films. The presented results indicate that light-induced thermocapillary flows can form and translate droplets and create indentation patterns on demand in thin liquid dielectric films of subwavelength thickness and that plasmonic microscopy can image these fluid dynamical processes with a subnanometer sensitivity along the vertical direction.