A theoretical study was performed on control of axial position of a terajet (TJ) by polarization state of incident plane wave. The TJ is generated in a reflection mode realized by putting a cuboid scatterer onto a reflection screen. The study shows that the polarization affects mainly transversal electric field profile of TJ as the scattering system has a higher symmetric structure, while affects more the focal length (FL) of TJ as the system has a lower symmetric structure. Further study focuses on the polarization effect of the FL of the TJ generated by a scattering system with a lower symmetry, and asymmetries caused by geometries of scatterer and reflection screen and their relative position are considered. The results show that the effect is closely related to the asymmetric extent of scatterer system and both have a non-monotonic relationship. The polarization can induce FL change by nine times. The effect caused by geometric asymmetry of scatterer or reflection screen is stronger than that by the asymmetry of their relative position. The introduction of reflection screen increases complexity of interference of scattered waves and hence results in some interesting features of FL polarization effect, such as non-monotonic asymmetry dependence, absence of the effect for some specific asymmetrical structures and threshold polarization angle effect on characteristic parameters of TJ. It is included that the FL of the TJ generated by an asymmetric scatterer structure in reflection mode can be effectively controlled by polarization state.

对入射平面波偏振态控制太射流（TJ）轴向位置进行了理论研究。TJ是通过将长方体散射体放置在反射屏上而实现的反射模式产生的。研究表明，当散射系统具有较高的对称结构时，极化主要影响TJ的横向电场分布，而当系统具有较低的对称结构时，极化对TJ的焦距（FL）影响更大。进一步的研究重点是对称性较低的散射系统产生的TJ FL的偏振效应，并考虑了由散射体和反射屏的几何形状及其相对位置引起的不对称性。结果表明，该效应与散射体系统的不对称程度密切相关，且两者具有非单调关系。偏振可以引起 FL 变化九倍。散射体或反射屏的几何不对称造成的影响比它们相对位置不对称造成的影响更强。反射屏的引入增加了散射波干涉的复杂性，从而导致了FL偏振效应的一些有趣特征，例如非单调不对称依赖性、某些特定不对称结构的影响缺失以及阈值偏振角对特征参数的影响。 TJ。其中包括反射模式下非对称散射体结构产生的TJ的FL可以通过偏振态有效控制。