Khonina Svetlana N, Porfirev Aleksey P
Image Processing Systems Institute of RAS - Branch of the Federal Scientific Research Centre "Crystallography and Photonics" of Russian Academy of Sciences, Samara 443001, Russia.
Samara National Research University, Samara 443086, Russia.
Nanophotonics. 2021 Oct 25;11(4):697-712. doi: 10.1515/nanoph-2021-0418. eCollection 2022 Jan.
We propose vector modes based on inhomogeneously polarized Hermite-Gaussian (HG) vector beams, providing complete structural conservation of the beams during propagation. Like uniformly polarized mode beams, these beams provide structural stability (or invariance) of both the intensity and the polarization state, in turn ensuring the stability of other field characteristics, including the angular momentum. We determine the conditions imposed on the HG mode composition in the transverse components of the electromagnetic field in order to control the three-dimensional characteristics of the field, such as intensity, polarization, and spin angular momentum (SAM). For the visual analysis of the polarization state of inhomogeneously polarized beams, we use the transverse distribution of the vector of three Stokes parameters. The correspondence of the third Stokes parameter to the distribution of the longitudinal component of the SAM is used for experimental measurements. The theoretical analysis is clearly illustrated by numerical simulations and confirmed by experimental results.
我们提出了基于非均匀极化厄米-高斯（HG）矢量光束的矢量模式，可在传播过程中实现光束的完全结构守恒。与均匀极化模式光束一样，这些光束可提供强度和偏振态的结构稳定性（或不变性），进而确保包括角动量在内的其他场特性的稳定性。我们确定了对电磁场横向分量中HG模式组成所施加的条件，以控制场的三维特性，如强度、偏振和自旋角动量（SAM）。为了直观分析非均匀极化光束的偏振态，我们使用了三个斯托克斯参数矢量的横向分布。第三个斯托克斯参数与SAM纵向分量分布的对应关系用于实验测量。数值模拟清晰地说明了理论分析，并得到了实验结果的证实。
