Vyas Sunil, Kozawa Yuichi, Sato Shunichi
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan.
J Opt Soc Am A Opt Image Sci Vis. 2011 May 1;28(5):837-43. doi: 10.1364/JOSAA.28.000837.
The property of self-healing at the focal plane for both scalar and vector Bessel-Gauss (BG) beams is investigated in the tight focusing condition. For the BG beam, which is partially obstructed at the pupil plane, the spatial intensity distribution at the focal plane is well recovered. Furthermore, recovery of not only intensity but also polarization distribution is observed for an obstructed vector BG beam. This self-healing effect for both the intensity and polarization components is recognized even when the half of the beam is obstructed by a semicircular obstacle. The effect of the size of the obstacle on recovery of polarization and intensity distribution is studied. The role of the beam size at the pupil plane is also discussed.
在紧聚焦条件下，研究了标量和矢量贝塞尔 - 高斯（BG）光束在焦平面处的自愈合特性。对于在光瞳平面处部分受阻的BG光束，焦平面处的空间强度分布能很好地恢复。此外，对于受阻的矢量BG光束，不仅强度分布能恢复，偏振分布也能恢复。即使光束的一半被半圆形障碍物阻挡，强度和偏振分量的这种自愈合效应依然存在。研究了障碍物尺寸对偏振和强度分布恢复的影响。还讨论了光瞳平面处光束尺寸的作用。
