Hu Kelei, Chen Ziyang, Pu Jixiong
College of Information Science and Engineering, Huaqiao University, Xiamen, Fujian, China.
J Opt Soc Am A Opt Image Sci Vis. 2012 Jun 1;29(6):1099-104. doi: 10.1364/JOSAA.29.001099.
We theoretically investigate the tight focusing properties of hybridly polarized vector beams. Some numerical results are obtained to illustrate the intensity, phase, and polarization of tightly focused hybridly polarized vector beams. It is shown that the shape of the focal pattern may change from an elliptical beam to a ring focus with increasing radial index. The phase distribution around the tightly focused ring is shown to be the helical phase profile, indicating that the radial-variant spin angular momentum of hybridly polarized vector beams can be converted into the radial-variant orbital angular momentum.
我们从理论上研究了混合偏振矢量光束的紧聚焦特性。通过一些数值结果来说明紧聚焦混合偏振矢量光束的强度、相位和偏振。结果表明，随着径向折射率的增加，焦斑图案的形状可能从椭圆光束变为环形焦点。紧聚焦环周围的相位分布呈现为螺旋相位分布，这表明混合偏振矢量光束的径向变化自旋角动量可以转换为径向变化的轨道角动量。
