Dresden 2011 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 15: Poster 1: Quanteninformation, Quanteneffekte, Laserentwicklung, Laseranwendungen, Ultrakurze Pulse, Photonik
Q 15.88: Poster
Monday, March 14, 2011, 16:30–19:30, P1
Self-focusing and defocusing of twisted light in non-linear media. — •Anita Thakur1,2 and Jamal Berakdar2 — 1Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle(Saale) — 2Institut für Physik, Martin-Luther Universität Halle-Wittenberg, Heinrich Damerow Str.4, 06120 Halle(Saale), Germany.
We study the self-focusing and defocusing of a light beam carrying angular momentum (called twisted light) propagating in a non-linear medium. We derive a differential equation for the beam width parameter f as a function of the propagation distance, angular frequency, beam waist and intensity of the beam. The method is based on the Wentzel-Kramers-Brillouin and the paraxial approximations. Analytical expressions for f are obtained, analyzed and illustrated for typical experimental situations.