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Chirality and helicity of linearly-polarised Laguerre-Gaussian beams of small beam waists

Koksal, K.; Babiker, M.; Lembessis, V. E.; Yuan, J.


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        "affiliation": "Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England", 
        "name": "Babiker, M."
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      {
        "affiliation": "King Saud Univ, Coll Sci, Dept Phys & Astron, Quantum Technol Grp, Riyadh 11451, Saudi Arabia", 
        "name": "Lembessis, V. E."
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      {
        "affiliation": "Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England", 
        "name": "Yuan, J."
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    "description": "The chirality and helicity of a linearly polarised Laguerre-Gaussian (LG) beam are examined. Such a type of light possesses a large longitudinal field amplitude when it is created with a sufficiently small beam waist and so gives rise to substantial magnitudes of chirality and helicity density distributions. In the simplest case of a doughnut beam of winding number l = 1 and another identical to it but for which l = -1, we obtain different chirality and helicity distributions in the focal plane z = 0. We also show that this chiral behaviour persists and the patterns evolve so that on planes at z < 0 and z > 0 the beam convergence phase contributes differently to the changes in the chirality and helicity distributions.", 
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    "title": "Chirality and helicity of linearly-polarised Laguerre-Gaussian beams of small beam waists"
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