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Near-field self-induced hollow spot through localized heating of polycarbonate/ZnS stack layer

机译:通过局部加热聚碳酸酯/ ZnS叠层的近场自感空心点

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摘要

We have found an alternative way of achieving a doughnutlike focused spot by simply melting a sub-wavelength scatterer in a polycarbonate/ZnS sample. The near-field microscopy technique is used to directly measure the induced doughnut spot in the near-field regime. A numerical model based on rigorous solution of the Maxwell's equations is proposed to study the phenomena. The simulations help to understand the optical mechanism behind the spot formation.
机译:我们发现了一种简单的方法,可以通过简单地熔化聚碳酸酯/ ZnS样品中的亚波长散射体来获得甜甜圈状的焦点。近场显微镜技术用于直接测量近场状态下的甜甜圈斑点。提出了基于麦克斯韦方程严格解的数值模型来研究这种现象。模拟有助于理解斑点形成背后的光学机理。

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