We propose a scheme to produce structured light in synchrotron light sources. In this scheme, light beams from two undulators are superposed by using a technique akin to the “cross undulator.” We demonstrate that a vector beam, in which the polarization direction varies with the azimuthal angle about the beam axis, is produced by superposing harmonic radiation from two helical undulators in tandem. Although this scheme is demonstrated in the ultraviolet range at the low-energy synchrotron UVSOR-III, it can be applied to high-energy synchrotrons to produce vector x-ray beams, which would open a new field in the application of synchrotron radiation.We propose a scheme to produce structured light in synchrotron light sources. In this scheme, light beams from two undulators are superposed by using a technique akin to the “cross undulator.” We demonstrate that a vector beam, in which the polarization direction varies with the azimuthal angle about the beam axis, is produced by superposing harmonic radiation from two helical undulators in tandem. Although this scheme is demonstrated in the ultraviolet range at the low-energy synchrotron UVSOR-III, it can be applied to high-energy synchrotrons to produce vector x-ray beams, which would open a new field in the application of synchrotron radiation.

中文翻译：

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用串联螺旋波荡器生成矢量光束

我们提出了一种在同步加速器光源中产生结构光的方案。在这个方案中，来自两个波荡器的光束通过使用类似于“交叉波荡器”的技术叠加。我们证明了矢量光束，其中偏振方向随着围绕光束轴的方位角而变化，是通过叠加来自两个串联螺旋波荡器的谐波辐射产生的。虽然该方案在低能同步加速器UVSOR-III的紫外范围内得到了证明，但它可以应用于高能同步加速器产生矢量X射线束，这将为同步辐射应用开辟新的领域。提出了一种在同步加速器光源中产生结构光的方案。在该方案中，来自两个波荡器的光束通过使用类似于“交叉波荡器”的技术叠加。“我们证明了矢量光束，其中偏振方向随围绕光束轴的方位角而变化，是通过叠加来自两个串联螺旋波荡器的谐波辐射而产生的。虽然该方案在低能同步加速器UVSOR-III的紫外范围内得到证明，但它可以应用于高能同步加速器产生矢量X射线束，这将为同步辐射应用开辟一个新领域。