期刊
OPTICS EXPRESS
卷 20, 期 28, 页码 29540-29552出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.20.029540
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资金
- Foundation for Polish Science TEAM project
- EU European Regional Development Fund
- FP7 FET project Q-ESSENCE [248095]
- National Science Centre [DEC-2011/03/D/ST2/01941]
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. (C) 2012 Optical Society of America
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