Youngworth K, Brown T
Opt Express. 2000 Jul 17;7(2):77-87. doi: 10.1364/oe.7.000077.
Cylindrical-vector beams are of increasing recent interest for their role in novel laser resonators and their applications to electron acceleration and scanning microscopy. In this paper, we calculate cylindrical-vector fields, near the focal region of an aplanatic lens, and briefly discuss some applications. We show that, in the particular case of a tightly focused, radially polarized beam, the polarization shows large inhomogeneities in the focal region, while the azimuthally polarized beam is purely transverse even at very high numerical apertures.
圆柱矢量光束因其在新型激光谐振器中的作用以及在电子加速和扫描显微镜中的应用，近来受到越来越多的关注。在本文中，我们计算了消球差透镜焦区附近的圆柱矢量场，并简要讨论了一些应用。我们表明，在紧聚焦径向偏振光束的特殊情况下，焦区内的偏振呈现出很大的不均匀性，而即使在非常高的数值孔径下，方位角偏振光束也纯粹是横向的。
