Quantitative orbital angular momentum measurement of perfect vortex beams
نویسندگان
چکیده
منابع مشابه
Electron vortex beams with high quanta of orbital angular momentum.
Electron beams with helical wavefronts carrying orbital angular momentum are expected to provide new capabilities for electron microscopy and other applications. We used nanofabricated diffraction holograms in an electron microscope to produce multiple electron vortex beams with well-defined topological charge. Beams carrying quantized amounts of orbital angular momentum (up to 100ħ) per electr...
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In this work we derive expressions for the orbital angular momentum (OAM) density of light, for both symmetric and nonsymmetric optical fields, that allow a direct comparison between theory and experiment. We present a simple method for measuring the OAM density in optical fields and test the approach on superimposed nondiffracting higher-order Bessel beams. The measurement technique makes use ...
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ژورنال
عنوان ژورنال: Optics Letters
سال: 2019
ISSN: 0146-9592,1539-4794
DOI: 10.1364/ol.44.002736