Ultraslow Helical Optical Bullets and Their Acceleration in Magneto-Optically Controlled Coherent Atomic Media

Abstract

We propose a scheme to produce ultraslow (3+1)-dimensional helical optical solitons, alias helical optical bullets, in a resonant three-level $\Lambda$-type atomic system via quantum coherence. We show that, due to the effect of electromagnetically induced transparency, the helical optical bullets can propagate with an ultraslow velocity up to $10^{-5}$ $c$ ($c$ is the light speed in vacuum) in longitudinal direction and a slow rotational motion (with velocity $10^{-7}$ $c$) in transverse directions. The generation power of such optical bullets can be lowered to microwatt, and their stability can be achieved by using a Bessel optical lattice potential formed by a far-detuned laser field. We also show that the transverse rotational motion of the optical bullets can be accelerated by applying a time-dependent Stern-Gerlach magnetic field. Because of the untraslow velocity in the longitudinal direction, a significant acceleration of the rotational motion of optical bullets may be observed for a very short medium length.

21 pages, 5 figures

References in corpus (5)

• Observation of persistent flow of a Bose-Einstein condensate in a toroidal trap
• Generalized Stern-Gerlach Effect for Chiral Molecules
• Weak-Light Ultraslow Vector Optical Solitons via Electromagnetically Induced Transparency
• Magneto-Optical Stern-Gerlach Effect in Atomic Ensemble
• Acceleration and localization of matter in a ring trap

Cited by in corpus (1)

• Guiding ultraslow weak-light bullets with Airy beams in a coherent atomic system