Cardano Filippo, Karimi Ebrahim, Slussarenko Sergei, Marrucci Lorenzo, de Lisio Corrado, Santamato Enrico
Dipartimento di Scienze Fisiche, Università di Napoli Federico II, Napoli, Italy.
Appl Opt. 2012 Apr 1;51(10):C1-6. doi: 10.1364/AO.51.0000C1.
We describe the polarization topology of the vector beams emerging from a patterned birefringent liquid crystal plate with a topological charge q at its center (q-plate). The polarization topological structures for different q-plates and different input polarization states have been studied experimentally by measuring the Stokes parameters point-by-point in the beam transverse plane. Furthermore, we used a tuned q=1/2-plate to generate cylindrical vector beams with radial or azimuthal polarizations, with the possibility of switching dynamically between these two cases by simply changing the linear polarization of the input beam.
我们描述了从中心具有拓扑电荷q的图案化双折射液晶板（q板）出射的矢量光束的偏振拓扑结构。通过逐点测量光束横向平面中的斯托克斯参数，对不同q板和不同输入偏振态的偏振拓扑结构进行了实验研究。此外，我们使用了一个调谐的q = 1/2板来产生具有径向或方位角偏振的圆柱矢量光束，并且可以通过简单地改变输入光束的线性偏振在这两种情况之间动态切换。
