Turpin A, Loiko Yu V, Peinado A, Lizana A, Kalkandjiev T K, Campos J, Mompart J
Opt Express. 2015 Mar 9;23(5):5704-15. doi: 10.1364/OE.23.005704.
Coherent vector beams with involved states of polarization (SOP) are widespread in the literature, having applications in laser processing, super-resolution imaging and particle trapping. We report novel vector beams obtained by transforming a Gaussian beam passing through a biaxial crystal, by means of the conical refraction phenomenon. We analyze both experimentally and theoretically the SOP of the different vector beams generated and demonstrate that the SOP of the input beam can be used to control both the shape and the SOP of the transformed beam. We also identify polarization singularities of such beams for the first time and demonstrate their control by the SOP of the input beam.
具有复杂偏振态（SOP）的相干矢量光束在文献中广泛存在，在激光加工、超分辨率成像和粒子捕获等领域有应用。我们报告了通过利用圆锥折射现象，使高斯光束通过双轴晶体变换而获得的新型矢量光束。我们对所产生的不同矢量光束的偏振态进行了实验和理论分析，并证明输入光束的偏振态可用于控制变换后光束的形状和偏振态。我们还首次识别了此类光束的偏振奇点，并证明了可通过输入光束的偏振态对其进行控制。
