Radhakrishna B, Kadiri Gururaj, Raghavan G
J Opt Soc Am A Opt Image Sci Vis. 2022 Apr 1;39(4):662-666. doi: 10.1364/JOSAA.452086.
A novel polarimetric method of generating a variety of Poincaré beams such as half Poincaré beams and full Poincaré beams using doubly inhomogeneous wave plates (-plates) is proposed. In this method, every input state of polarization (SoP) through such a -plate generates a unique Poincaré beam, thereby giving access to a potentially infinite number of them. Furthermore, the generation of full Poincaré beams is presented here as an instance of the geometrical problem of mapping the surface of a sphere onto a plane, and this insight allows one to design -plates that convert the input SoP to every possible SoP, within a finite region of the beam. A gadget composed of three singly inhomogeneous wave plates for an equivalent realization of these -plates is also presented.
提出了一种新颖的偏振测量方法，该方法使用双非均匀波片（- 波片）生成各种庞加莱光束，如半庞加莱光束和全庞加莱光束。在这种方法中，通过这样一个 - 波片的每个输入偏振态（SoP）都会生成一个独特的庞加莱光束，从而有可能获得数量无限的此类光束。此外，全庞加莱光束的生成在此被视为将球面映射到平面的几何问题的一个实例，这种见解使人们能够设计 - 波片，在光束的有限区域内将输入的 SoP 转换为每一种可能的 SoP。还提出了一种由三个单非均匀波片组成的装置，用于等效实现这些 - 波片。
