Acta Photonica Sinica, Volume. 43, Issue 7, 726001(2014)
Amendment for Tightly Focusing of Cylindrically Polarized Vortex Beams
Considering the radial component and azimuthal component of the vortex beam in focusing contribution, the tightly focusing formula of Cylindrical Vortex Beams(CVB) was amended. The CVB focusing intensity distribution was afresh investigated in the focal region by using amendatory tightly focusing formula. The results show that the flattopped focus and the focal hole are proposed by adjusting the Polarization Rotation(PR) angle, NumericalAperture(NA) and the Aperture Blocking(AB). The adjustably confined flattopped focus can be generated by adjusting PR angle. And the flattopped focus can be obtained for the relative small NA with the increasing of AB. The narrower focal hole can be obtained in the higher NA when AB is larger.
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LIU Jian, YANG Yanfang, HE Ying, LIU Guowei, ZHENG Xiao. Amendment for Tightly Focusing of Cylindrically Polarized Vortex Beams[J]. Acta Photonica Sinica, 2014, 43(7): 726001
Received: Nov. 11, 2013
Accepted: --
Published Online: Aug. 18, 2014
The Author Email: Jian LIU (LJJLJJ@shu.edu.cn)
CSTR:32186.14.