期刊
PHYSICAL REVIEW LETTERS
卷 119, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.119.094802
关键词
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资金
- Engineering and Physical Sciences Research Council [EP/G070474/1, EP/G070326/1]
- European Cooperation in Science and Technology Grant [MP0903]
- National Natural Science Foundation of China [61205122, 11474048]
- Engineering and Physical Sciences Research Council [EP/J022098/1, EP/G070326/1, EP/G070474/1] Funding Source: researchfish
- EPSRC [EP/G070326/1, EP/G070474/1, EP/J022098/1] Funding Source: UKRI
A general orbital-angular-momentum (OAM) mode selection principle is put forward involving the rotationally symmetric superposition of chiral states. This principle is not only capable of explaining the operation of vortex generating elements such as spiral zone plate holograms, but more importantly, it enables the systematic and flexible generation of structured OAM waves in general. This is demonstrated both experimentally and theoretically in the context of electron vortex beams using rotationally symmetric binary amplitude chiral sieve masks.
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