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Gradient echo memory in a tripod-like dense atomic medium

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Carreño Sánchez, Fernando and Antón Revilla, Miguel Ángel (2010) Gradient echo memory in a tripod-like dense atomic medium. Optics Communications, 283 (23). pp. 4787-4795. ISSN 0030-4018

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Official URL: https://doi.org/10.1016/j.optcom.2010.07.024




Abstract

We analyze the storage and retrieval of a weak light pulse, having two orthogonally (circularly) polarized components, onto an atomic ensemble of four-level atoms of the tripod type driven by a far detuned coupling field. The atoms are subject to a longitudinal magnetic field which produces a spatially varying Zeeman splitting of the lower levels along the medium and allows for a spatial encoding of the different angular frequencies of the input pulse during the storage phase. A single reversion of the external magnetic field results in a rephasing of the dipoles and leads to the release of the stored signals. The shape of the recovered pulse is a time-reversal copy of the input pulse. The application of an additional reversion of the magnetic field during the storage phase allows the release of a copy of the input pulse without time reversal. We also show that the system may operate like an all-optical multiplexer when considering two impinging optical fields which have orthogonal components. The proposal has potential applications in quantum information processing.


Item Type:Article
Additional Information:

Received 9 March 2010, Revised 28 May 2010, Accepted 1 July 2010, Available online 24 July 2010.

Uncontrolled Keywords:Coherent optical effects; Optical memory; Optical echoes
Subjects:Sciences > Physics > Optics
Medical sciences > Optics > Geometrical and instumental optics
ID Code:47730
Deposited On:31 May 2018 07:18
Last Modified:31 May 2018 11:35

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