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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 28 — Dec. 31, 2012
  • pp: 29540–29552

Generation and delayed retrieval of spatially multimode Raman scattering in warm rubidium vapors

Radosław Chrapkiewicz and Wojciech Wasilewski  »View Author Affiliations

Optics Express, Vol. 20, Issue 28, pp. 29540-29552 (2012)

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We apply collective Raman scattering to create, store and retrieve spatially multimode light in warm rubidium-87 vapors. The light is created in a spontaneous Stokes scattering process. This is accompanied by the creation of counterpart collective excitations in the atomic ensemble – the spin waves. After a certain storage time we coherently convert the spin waves into the light in deterministic anti-Stokes scattering. The whole process can be regarded as a delayed four-wave mixing which produces pairs of correlated, delayed random images. Storage of higher order spatial modes up to microseconds is possible owing to usage of a buffer gas. We study the performance of the Raman scattering, storage and retrieval of collective excitations focusing on spatial effects and the influence of decoherence caused by diffusion of rubidium atoms in different buffer gases. We quantify the number of modes created and retrieved by analyzing statistical correlations of intensity fluctuations between portions of the light scattered in the far field.

© 2012 OSA

OCIS Codes
(020.0020) Atomic and molecular physics : Atomic and molecular physics
(030.4070) Coherence and statistical optics : Modes
(270.6630) Quantum optics : Superradiance, superfluorescence
(290.5910) Scattering : Scattering, stimulated Raman

ToC Category:
Atomic and Molecular Physics

Original Manuscript: October 31, 2012
Revised Manuscript: December 7, 2012
Manuscript Accepted: December 9, 2012
Published: December 19, 2012

Radosław Chrapkiewicz and Wojciech Wasilewski, "Generation and delayed retrieval of spatially multimode Raman scattering in warm rubidium vapors," Opt. Express 20, 29540-29552 (2012)

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