Regensburg 2010 – wissenschaftliches Programm
HL 60.33: Poster
Donnerstag, 25. März 2010, 18:00–20:00, Poster D1
Self focusing of electromagnetic beam in nonlinear medium. — •Anita Thakur1,2 and Jamal Berakdar2 — 1Max Planck Institute of Microstructure Physics Weinberg 2, D-06120 Halle, Germany — 2Institute of Physics, Martin Luther University Halle-Wittenberg, Heinrich-Damerow-Str.4, D-06120 Halle (Saale), Germany
Recent years have witnessed a rapid progress in the controlled optical pulse generation, shaping and propagation in various media. Here we theoretically investigate the self focusing of a laser beam in a parabolic medium by using Wentzel-Kramers-Brillouin (WKB) method within the paraxial ray approximation. We demonstrate numerically the effect of the beam intensity on the focusing /defocusing of the beam. Furthermore, we conducted calculations for inhomogeneous light fields that carry an orbital angular momentum and contrast the results to conventional Gaussian beams.