中国物理B ›› 2011, Vol. 20 ›› Issue (11): 114202-114202.doi: 10.1088/1674-1056/20/11/114202
• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇 下一篇
舒建华, 陈子阳, 蒲继雄, 刘永欣
Shu Jian-Hua(舒建华), Chen Zi-Yang(陈子阳),Pu Ji-Xiong(蒲继雄)†, and Liu Yong-Xin(刘永欣)
摘要: Based on vectorial Debye theory, the focusing properties of partially polarized vortex beam by high numerical aperture Fresnel zone plate are investigated. The effects of the numerical apertures of and the phase difference of binary phase Fresnel zone plates, the topological charge of vortex beam and the degree of polarization of incident beam on the intensity distribution and degree of coherence in the focal plane are investigated in detail. It is shown that elliptical light spots and the flat top beam can be obtained by selecting certain parameters. Studies of degree of coherence reveal that the degree of coherence between x and y components of the electric field, which is zero in the source plane, is improved in the focal plane for vortex beam, but it is hardly changed for the nonvortex beam. It is also proved that any two of the three electric field components Ex, Ey and Ez are completely coherent everywhere in the focal region if the incident light beam is linearly polarized.
中图分类号: (Polarization)