拓扑结构黑暗的Angular Momentum
The Angular Momentum of Topologically Structured Darkness
摘要：
我们从理论上分析和实验测量分数涡旋光束中发现的拓扑结构黑暗的外在角动量贡献，并表明这种结构黑暗可以解释为在相位不连续的产生光学倏逝波。我们还演示了第一次直接测量的光的固有轨道角动量的内在和外在的角动量，并解释了为什么分数涡旋的总轨道角动量不匹配的缠绕数，其产生的相位。
英文摘要：
We theoretically analyze and experimentally measure the extrinsic angular momentum contribution of topologically structured darkness found within fractional vortex beams, and show that this structured darkness can be explained by evanescent waves at phase discontinuities in the generating optic. We also demonstrate the first direct measurement of the intrinsic orbital angular momentum of light with both intrinsic and extrinsic angular momentum, and explain why the total orbital angular momenta of fractional vortices do not match the winding number of their generating phases.
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