Generation of Light Carrying Orbital Angular Momentum via Induced Coherence Grating in Cold Atoms
- 31 March 2003
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 90 (13), 133001
- https://doi.org/10.1103/physrevlett.90.133001
Abstract
We report on the generation of light carrying orbital angular momentum through Bragg diffraction into an electromagnetically induced coherence grating in a degenerate two-level system of cold cesium atoms. The induced Zeeman coherence grating is shown to contain the spatial phase structure of the incident beams. The exchange of phase information between a light beam with orbital angular momentum and a long-lived atomic coherence opens up the way to process quantum information encoded in a multidimensional state space.Keywords
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