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Nanostructured holograms for broadband manipulation of vector beams

机译：用于矢量束宽带处理的纳米全息图

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摘要

We report a new type of holographic interface, which is able to manipulate the three fundamental properties of light (phase, amplitude, and polarization) over a broad wavelength range. The design strategy relies on replacing the large openings of conventional holograms by arrays of subwavelength apertures, oriented to locally select a particular state of polarization. The resulting optical element can therefore be viewed as the superposition of two independent structures with very different length scales, that is, a hologram with each of its apertures filled with nanoscale openings to only transmit a desired state of polarization. As an implementation, we fabricated a nanostructured holographic plate that can generate radially polarized optical beams from circularly polarized incident light, and we demonstrated that it can operate over a broad range of wavelengths. The ability of a single holographic interface to simultaneously shape the amplitude, phase, and polarization of light can find widespread applications in photonics.
机译：我们报告了一种新型的全息界面，它能够在很宽的波长范围内操纵光的三个基本属性（相位，幅度和偏振）。该设计策略依赖于用亚波长孔径阵列代替常规全息图的大开口，这些孔径定向成局部选择特定的偏振态。因此，所得到的光学元件可以被看作是两个独立的结构的叠加，它们具有非常不同的长度比例，即全息图，其每个孔填充有纳米级开口，仅透射所需的偏振态。作为一种实现，我们制造了可以从圆偏振入射光产生径向偏振光束的纳米结构全息板，并且我们证明了它可以在很宽的波长范围内工作。单个全息界面同时成形光的振幅，相位和偏振的能力可以在光子学中找到广泛的应用。

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