arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.00733physics.opticsastro-ph.IM
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自由空心光束的几何相位波片

Geometric-Phase Waveplates for Free-Form Dark Hollow beams

Bruno Piccirillo, Ester Piedipalumbo, Enrico Santamato

摘要:

我们展示了创建具有雕刻到异国情调的强度景观模仿各种各样的不同的平面曲线的形状的相位奇点的光束的可能性。为了实现这一目标,我们已经开发出一种方法,直接编码的几何特性的一些选定的曲线成一个单一的方位角相位因子,而不通过间接加密方法的基础上冗长的数值程序。利用该结果对液晶基非均匀波片的光轴分布进行了建模。最后利用该方法对输入的高斯光束进行了Pancharatnam-Berry位相波前整形。

英文摘要:

We demonstrate the possibility to create optical beams with phase singularities engraved into exotic intensity landscapes imitating the shapes of a large variety of diverse plane curves. To achieve this aim, we have developed a method for directly encoding the geometric properties of some selected curve into a single azimuthal phase factor without passing through indirect encryption methods based on lengthy numerical procedures. The outcome is utilized to mould the optic axis distribution of a liquid-crystal-based inhomogeneous waveplate. The latter is finally used to sculpt the wavefront of an input optical gaussian beam via Pancharatnam-Berry phase.

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