Phys. Rev. Lett. 83, 4967–4970 (1999)Optical Pumping of Orbital Angular Momentum of Light in Cold Cesium AtomsReceived 25 May 1999; published in the issue dated 13 December 1999 We present experimental results on the transfer of the orbital angular momentum of light to a system of cold cesium atoms. A nondegenerate four-wave mixing process was used as an indirect tool to observe this transfer. Our experiments show, in particular, that the orbital angular momentum of light can be transferred, via optical pumping in the cold atomic sample, from one beam to another oscillating at a different frequency. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.4967
DOI:
10.1103/PhysRevLett.83.4967
PACS:
32.80.Pj, 42.50.Vk, 42.65.Hw
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