Journal
NATURE PHOTONICS
Volume 8, Issue 4, Pages 287-291Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHOTON.2014.45
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Funding
- Engineering and Physical Sciences Research Council (EPSRC) [EP/J000051/1]
- Quantum Interfaces, Sensors, and Communication based on Entanglement Integrating Project (EU IP Q-ESSENCE) [248095, 600645]
- Air Force Office of Scientific Research
- European Office of Aerospace Research & Development (AFOSR EOARD) [FA8655-09-1-3020]
- Royal Society
- Clarendon Fund
- St Edmund Hall
- EU ITN FASTQUAST
- EU Marie-Curie Fellowship [PIIF-GA2011-300820, PIEF-GA-2012-331859]
- EPSRC [EP/J000051/1, EP/K034480/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K034480/1, EP/J000051/1] Funding Source: researchfish
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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.
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