Tight focusing properties of hybridly polarized vector beams.
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.
College of Information Science and Engineering, Huaqiao University, Xiamen, Fujian, China.
Kelei
K
Hu
Ziyang
Z
Chen
Jixiong
J
Pu