We report an experiment in which an optical vortex is stored in Rb vapor. Because of its 2? phase twist, this mode is topologically stable and cannot unwind even under conditions of strong diffusion.
© 2008 Optical Society of America
(020.0020) Atomic and molecular physics : Atomic and molecular physics
(020.1670) Atomic and molecular physics : Coherent optical effects
(020.1335) Atomic and molecular physics : Atom optics
R. Pugatch, M. Shuker, O. Firstenberg, A. Ron, and N. Davidson, "Topological Stability of Stored Optical Vortices," in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies, OSA Technical Digest (CD) (Optical Society of America, 2008), paper QThB2.