Sagnac interferometer method for synthesis of fractional polarization vortices.
Sagnac interferometer method for synthesis of fractional polarization vortices.
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DOI：
10.1364/ol.34.002560
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发表时间：
2009-09
期刊：
影响因子：
3.6
通讯作者：
P. H. Jones;M. Rashid;M. Makita;O. Maragò
中科院分区：
文献类型：
--
作者：
P. H. Jones;M. Rashid;M. Makita;O. Maragò
我们提出了一种产生非均匀偏振激光束的方法，其中偏振方向在围绕光束传播方向的轨迹上旋转。我们的方法使用萨格纳克干涉仪，该干涉仪结合了空间光调制器来组合具有相反电荷相位涡旋的光束，以实现所需的偏振涡旋。我们通过产生以分数指数为特征的偏振涡旋来证明我们的方法的实用性，并将结果与预期场的计算结果进行比较。
We present a method for producing laser beams of nonuniform polarization where the polarization direction rotates on a trajectory about the beam propagation direction. Our method uses a Sagnac interferometer that incorporates a spatial light modulator to combine beams that possess oppositely charged phase vortices in order to achieve the desired polarization vortex. We demonstrate the utility of our method by producing polarization vortices characterized by a fractional index, and we compare the results with calculations of the expected fields.