Diffraction of plane waves by finite-radius spiral phase plates of integer and fractional topological charge.
Diffraction of plane waves by finite-radius spiral phase plates of integer and fractional topological charge.
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DOI：
10.1364/josaa.26.000794
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发表时间：
2009-04
期刊：
影响因子：
--
通讯作者：
H. Garcia-Gracia;J. Gutiérrez-Vega
中科院分区：
文献类型：
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作者：
H. Garcia-Gracia;J. Gutiérrez-Vega
本文详细分析了有限半径圆形螺旋相片（SPP）的平面波衍射。SPP具有整数和分数拓扑电荷，板边缘内外的透射系数是可变的。我们描述了不同传输系数和SPP参数对传播场的影响。分析了平板边缘相消和不相消的spp的整数相阶和分数相阶涡结构。考虑穿过SPP的光与在孔径平面上没有相位变化的光之间的干涉，揭示了与这个经典问题相关的新的有趣现象。
A detailed analysis of the plane-wave diffraction by a finite-radius circular spiral phase plate (SPP) with integer and fractional topological charge and with variable transmission coefficients inside and outside of the plate edge is presented. We characterize the effect of varying the transmission coefficients and the parameters of the SPP on the propagated field. The vortex structure for integer and fractional phase step of the SPPs with and without phase apodization at the plate edge is also analyzed. The consideration of the interference between the light crossing the SPP and the light that undergoes no phase alteration at the aperture plane reveals new and interesting phenomena associated to this classical problem.