Lü Jia-Qi, Wang Wen-Yue, Cheng Tian-Yu, Lu Zhi-Wei, Liu Shuo
Opt Express. 2021 Nov 22;29(24):39718-39728. doi: 10.1364/OE.441809.
As an inherent feature of vector optical field, the spatial distribution of polarization brings additional degrees of freedom to engineer the optical field and control the interaction between light and matters. Here we focus on the variation of polarization in single vector optical field, which can be defined by the trajectory on the Poincaré sphere. Based on the amplitude-phase-polarization joint modulation method we propose, vector optical field, whose variation of polarization follows arbitrary circular trajectory on the Poincaré sphere, can be generated. Moreover, the tightly focusing behaviors of the vector optical fields with the polarization varying along parallel circles on the Poincaré sphere are compared. Relations between the circular trajectory and the central intensity of the hollow focal field are concluded.
作为矢量光场的固有特性，偏振的空间分布为操控光场以及控制光与物质之间的相互作用带来了额外的自由度。在此，我们聚焦于单个矢量光场中偏振的变化，其可由庞加莱球面上的轨迹来定义。基于我们提出的振幅 - 相位 - 偏振联合调制方法，能够产生偏振在庞加莱球面上沿任意圆形轨迹变化的矢量光场。此外，还比较了偏振沿庞加莱球面上平行圆变化的矢量光场的紧聚焦行为。得出了圆形轨迹与空心焦场中心强度之间的关系。
