Department of Physics, Zhejiang University, Hangzhou 310027, China.
Opt Lett. 2010 May 1;35(9):1488-90. doi: 10.1364/OL.35.001488.
A type of square Fresnel zone plate with spiral phase for generating zero axial irradiance is proposed. Diffraction patterns of the zone plates with different generalized topological charges are given by numerical simulation, which also suggests their potential applications in generating hollow beams.
提出了一种用于产生零轴向辐照度的具有螺旋相位的方形菲涅耳波带片。通过数值模拟给出了具有不同广义拓扑电荷的波带片的衍射图样，这也表明它们在产生空心光束方面具有潜在的应用。
