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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Poynting vector and orbital angular momentum density of superpositions of Bessel beams
Igor A Litvin1, Angela Dudley, Andrew Forbes
1CSIR National Laser Centre, Pretoria, South Africa. 3ilitvin@csir.co.za
Abstract:
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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