Three-dimensional polarization control in microscopy
Three-dimensional polarization control in microscopy
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DOI：
10.1103/physrevlett.96.153901
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发表时间：
2006-04-21
影响因子：
8.6
通讯作者：
Toussaint, KC
中科院分区：
文献类型：
--
作者：
Abouraddy, AF;Toussaint, KC
我们提出了一种方法，光学显微镜，使完全控制的三维偏振矢量在高数值孔径透镜的焦点。透镜的输入场是线性偏振的，并且不需要偏振光学器件。该技术利用输入场的方位角空间自由度。我们发现只有一小部分低阶方位角空间谐波对轴上的聚焦场有贡献，并且这些谐波的线性矢量空间和三维极化矢量空间之间存在一个简单的变换。控制这些方位角谐波的相对复数权重产生任何期望的三维偏振状态。
We propose an approach to optical microscopy that enables full control over the three-dimensional polarization vector at the focal spot of a high-numerical-aperture lens. The input field to the lens is linearly polarized and no polarization optics are needed. This technique utilizes the azimuthal spatial degree of freedom of the input field. We find that only a small set of low-order azimuthal spatial harmonics contributes to the focused field on axis, and a simple transformation exists between the linear vector space of these harmonics and the three-dimensional polarization-vector space. Controlling the relative complex weights of these azimuthal harmonics produces any desired three-dimensional state of polarization.