Poynting vector and orbital angular momentum density of superpositions of Bessel beams

Poynting vector and orbital angular momentum density of superpositions of Bessel beams

We study theoretically the orbital angular momentum (OAM) density in arbitrary scalar optical fields, and outline a simple approach using only a spatial light modulator to measure this density. We demonstrate the theory in the laboratory by creating superpositions of non-diffracting Bessel beams wit...

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Veröffentlicht in:Optics express 2011-08, Vol.19 (18), p.16760-16771
Hauptverfasser: Litvin, Igor A, Dudley, Angela, Forbes, Andrew
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creator Litvin, Igor A
Dudley, Angela
Forbes, Andrew
description We study theoretically the orbital angular momentum (OAM) density in arbitrary scalar optical fields, and outline a simple approach using only a spatial light modulator to measure this density. We demonstrate the theory in the laboratory by creating superpositions of non-diffracting Bessel beams with digital holograms, and find that the OAM distribution in the superposition field matches the predicted values. Knowledge of the OAM distribution has relevance in optical trapping and tweezing, and quantum information processing.
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title Poynting vector and orbital angular momentum density of superpositions of Bessel beams
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