Geodesic
Multiple vortical laser traps
Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Kazanskii Gosudarstvennyi Universitet. Uchenye Zapiski. Seriya Fiziko-Matematichaskie Nauki, Tome 149 (2007) no. 1, pp. 8-12

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We consider three algorithms to obtain arrays of vortical laser traps: splitting the field with diffractive grating, different orders of gologram and special diffractive elements based on spiral beams optics. Numerical simulation and some experimental results for circle-shaped and triangular-shaped fields are presented. 
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     title = {Multiple vortical laser traps},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
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K. N. Afanas'ev; E. N. Vorontsov. Multiple vortical laser traps. Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Kazanskii Gosudarstvennyi Universitet. Uchenye Zapiski. Seriya Fiziko-Matematichaskie Nauki, Tome 149 (2007) no. 1, pp. 8-12. http://geodesic.mathdoc.fr/item/UZKU_2007_149_1_a1/