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Journal Article

Broadband single-photon-level memory in a hollow-core photonic crystal fibre

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Abdolvand,  A.
Russell Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Russell,  P. St J.
Russell Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Sprague, M. R., Michelberger, P. S., Champion, T. F. M., England, D. G., Nunn, J., Jin, X.-.-M., et al. (2014). Broadband single-photon-level memory in a hollow-core photonic crystal fibre. NATURE PHOTONICS, 8(4), 287-291. doi:10.1038/NPHOTON.2014.45.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002D-6615-5
Abstract
Storing information encoded in light is critical for realizing optical buffers for all-optical signal processing(1,2) and quantum memories for quantum information processing(3,4). These proposals require efficient interaction between atoms and a well-defined optical mode. Photonic crystal fibres can enhance light-matter interactions and have engendered a broad range of nonlinear effects(5); however, the storage of light has proven elusive. Here, we report the first demonstration of an optical memory in a hollow-core photonic crystal fibre. We store gigahertz-bandwidth light in the hyperfine coherence of caesium atoms at room temperature using a far-detuned Raman interaction. We demonstrate a signal-to-noise ratio of 2.6:1 at the single-photon level and a memory efficiency of 27 +/- 1%. Our results demonstrate the potential of a room-temperature fibre-integrated optical memory for implementing local nodes of quantum information networks.