期刊
PHYSICAL REVIEW LETTERS
卷 96, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.96.113901
关键词
-
资金
- Engineering and Physical Sciences Research Council [GR/S03904/01, GR/S03898/01] Funding Source: researchfish
We introduce the concept of quasi-intrinsic angular momentum to denote fields for which the mean value of the angular momentum is unaltered by a lateral shift of the rotation axis but the spectrum changes. This property is exemplified by the orbital angular momentum of a beam of light about its propagation direction. We propose an interferometric experiment to measure efficiently the exact angular momentum spectrum and variance for light beams with any arbitrary spatial distribution.
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