Geometric phase associated with mode transformations of optical beams bearing orbital angular momentum
Geometric phase associated with mode transformations of optical beams bearing orbital angular momentum
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DOI：
10.1103/physrevlett.90.203901
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发表时间：
2003-05-23
影响因子：
8.6
通讯作者：
Williams, RE
中科院分区：
文献类型：
--
作者：
Galvez, EJ;Crawford, PR;Williams, RE
我们提出了一种新的几何相位的直接测量获得的光束携带轨道角动量。当光束的横模在模式空间中沿着闭合路径变换时，出现该相位。测量是通过两个共同传播的光束，通过相同的干涉仪部分，但获得不同的几何相位的干涉。该方法对动态相位不敏感。测量相位的大小和符号与理论预测非常一致。
We present direct measurements of a new geometric phase acquired by optical beams carrying orbital angular momentum. This phase arises when the transverse mode of a beam is transformed following a closed path in the space of modes. The measurements were done via the interference of two copropagating optical beams that pass through the same interferometer parts but acquire different geometric phases. The method is insensitive to dynamical phases. The magnitude and sign of the measured phases are in excellent agreement with theoretical predictions.