Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

HL: Fachverband Halbleiterphysik

HL 60: Poster II: Optical Properties, incl. Photonic Crystals and Ultrafast Phenomena

HL 60.33: Poster

Donnerstag, 25. März 2010, 18:00–20:00, Poster D1

Self focusing of electromagnetic beam in nonlinear medium. — •Anita Thakur^1,2 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.