AI 中文总结
研究光学螺旋度的时间衍射，通过对空间和时间干涉的广义处理，实验证明正交偏振脉冲干涉产生的螺旋度图案，为理解和应用时变介质中复杂偏振图案及效应提供重要方法。
AI 中文摘要
在经典双缝干涉实验中，若通过一个狭缝的光与通过另一个狭缝的光处于正交偏振态，则不会出现可见干涉条纹。相反，在与两个正交偏振分量携带的能量差异相关的不同可观测值中会出现干涉条纹，从而导致空间变化的偏振图案，如线性偏振场情况下的光学螺旋度密度。在此，我们对空间和时间中的干涉进行了广义处理，并通过实验证明了正交偏振脉冲干涉产生的螺旋度图案，这在时间衍射观测中由两个时间狭缝产生。所开发的方法对于理解和应用时变介质中的复杂偏振图案和偏振效应可能很重要。
英文摘要
If in a classic double-slit interference experiment the light that passes though one slit is in an orthogonal polarisation state to that of the second slit, no visible interference fringes emerge. Interference fringes are instead present in a different observable that relates to the difference in energy carried by two orthogonal polarisation components, causing spatially varying polarisation patterns: the optical helicity density in the case of linearly polarised fields. Here, we develop a generalised treatment of interference in space and time, and experimentally demonstrate the helicity patterns produced by interference of orthogonally polarised pulses, which would be produced by two temporal slits in time diffraction observations. The developed approach may be important for understanding and applications of complex polarisation patterns and polarisation effects in time varying media.
