Self-healing of tightly focused scalar and vector Bessel-Gauss beams at the focal plane.
Self-healing of tightly focused scalar and vector Bessel-Gauss beams at the focal plane.
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DOI：
10.1364/josaa.28.000837
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发表时间：
2011-05
期刊：
影响因子：
--
通讯作者：
S. Vyas;Y. Kozawa;S. Sato
中科院分区：
文献类型：
--
作者：
S. Vyas;Y. Kozawa;S. Sato
研究了标量和矢量贝塞尔-高斯（BG）光束在紧聚焦条件下焦平面处的自愈特性。对于在光瞳面被部分遮挡的BG光束，焦平面上的空间光强分布得到了很好的恢复。此外，不仅恢复的强度，而且偏振分布观察到的阻碍矢量BG光束。即使当光束的一半被半圆形障碍物阻挡时，强度和偏振分量的这种自愈效应也是可以识别的。研究了障碍物尺寸对偏振恢复和光强分布的影响。还讨论了光瞳面处光束尺寸的作用。
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.