Peele Andrew G, McMahon Philip J, Paterson David, Tran Chanh Q, Mancuso Adrian P, Nugent Keith A, Hayes Jason P, Harvey Erol, Lai Barry, McNulty Ian
Opt Lett. 2002;27(20):1752-4. doi: 10.1364/ol.27.001752.
Phase singularities are a ubiquitous feature of waves of all forms and represent a fundamental aspect of wave topology. An optical vortex phase singularity occurs when there is a spiral phase ramp about a point phase singularity. We report an experimental observation of an optical vortex in a field consisting of 9-keV x-ray photons. The vortex is created with an x-ray optical structure that imparts a spiral phase distribution to the incident wave field and is observed by use of diffraction about a wire to create a division-of-wave-front interferometer.
相位奇点是各种形式波中普遍存在的特征，代表了波拓扑结构的一个基本方面。当围绕一个点相位奇点存在螺旋相位斜坡时，就会出现光学涡旋相位奇点。我们报告了在一个由9千电子伏特X射线光子组成的场中对光学涡旋的实验观测。该涡旋是通过一种X射线光学结构产生的，这种结构会给入射波场赋予螺旋相位分布，并通过利用围绕一根金属丝的衍射来创建波前分割干涉仪进行观测。
