From photons to phonons and back: A THz optical memory in diamond

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DOIResolve DOI: http://doi.org/10.1103/PhysRevLett.111.243601
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TypeArticle
Journal titlePhysical Review Letters
ISSN0031-9007
Volume111
Issue24
Article number243601
SubjectLocal synchronizations; Material dispersions; Optical phonon modes; Physical societies; Quantum technologies; Room temperature; Secure communications; Single quantum; Four wave mixing; Optical communication; Phonons; Photons; Quantum cryptography; Dispersions
AbstractOptical quantum memories are vital for the scalability of future quantum technologies, enabling long-distance secure communication and local synchronization of quantum components. We demonstrate a THz-bandwidth memory for light using the optical phonon modes of a room temperature diamond. This large bandwidth makes the memory compatible with down-conversion-type photon sources. We demonstrate that four-wave mixing noise in this system is suppressed by material dispersion. The resulting noise floor is just 7×10-3 photons per pulse, which establishes that the memory is capable of storing single quanta. We investigate the principle sources of noise in this system and demonstrate that high material dispersion can be used to suppress four-wave mixing noise in Λ-type systems. Published by the American Physical Society.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NPARC number21270897
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Record identifier5688d16e-4c65-4546-85c8-e06ec7ebe5a0
Record created2014-02-18
Record modified2016-05-09
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