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Scientific article
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English

Cavity-enhanced storage in an optical spin-wave memory

Published inNew journal of physics, vol. 16, no. 083005
Publication date2014
Abstract

We report on the experimental demonstration of an optical spin-wave memory, based on the atomic frequency comb (AFC) scheme, where the storage efficiency is strongly enhanced by an optical cavity. The cavity is of low finesse, but operated in an impedance matching regime to achieve high absorption in our intrinsically low-absorbing Eu3+:Y2SiO5 crystal. For storage of optical pulses as an optical excitation (AFC echoes), we reach efficiencies of 53% and 28% for 2 μs and 10 μs delays, respectively. For a complete AFC spin-wave memory we reach an efficiency of 12%, including spin-wave dephasing, which is a 12-fold increase with respect to previous results in this material. This result is an important step towards the goal of making efficient and long-lived quantum memories based on spin waves, in the context of quantum repeaters and quantum networks.

Keywords
  • Quantum communication
  • Photonic memory
  • Cavity-enhanced lightmatter interactions
  • Rare-earth-ion doped crystals
Citation (ISO format)
JOBEZ, Pierre et al. Cavity-enhanced storage in an optical spin-wave memory. In: New journal of physics, 2014, vol. 16, n° 083005. doi: 10.1088/1367-2630/16/8/083005
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ISSN of the journal1367-2630
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