In a numerical investigation, we demonstrate the existence and curious evolution of vortices in a ladder-type three-level nonlinear atomic vapor with linear, cubic, and quintic susceptibilities considered simultaneously with the dressing effect. We find that the number of beads and topological charge of the incident beam, as well as its size, greatly affect the formation and evolution of vortices. To determine the number of induced vortices and the corresponding rotation direction, we give common rules associated with the initial conditions coming from various incident beams.
© 2012 Optical Society of America
Original Manuscript: May 25, 2012
Revised Manuscript: July 20, 2012
Manuscript Accepted: September 17, 2012
Published: October 29, 2012
Yiqi Zhang, Zhenkun Wu, Chenzhi Yuan, Xin Yao, Keqing Lu, Milivoj Belić, and Yanpeng Zhang, "Optical vortices induced in nonlinear multilevel atomic vapors," Opt. Lett. 37, 4507-4509 (2012)