2015/09/18 by Kent Bonsma-Fisher, Kent A. G. Fisher, Duncan England +6
Materials Science · Physics and Astronomy · #Advanced Fiber Laser Technologies #Bandwidth (computing) #Computer science #Diamond #Diamond and Carbon-based Materials Research #Materials science #Multiplexing #Optics #Optoelectronics #Photon #Photon entanglement #Physics #Quantum #Quantum entanglement #Quantum mechanics #Quantum optics and atomic interactions #Raman spectroscopy #Single-photon source #Telecommunications #physics.optics #quant-ph
paper · pdf · doi:10.1038/ncomms11200
published as Nature Communications 7, 11200 (2016) · 6 pages, 4 figures
arxiv created 2015/09/18 · openalex publication_date 2016/04/05 · arxiv updated 2016/04/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The spectral manipulation of photons is essential for linking components in a quantum network. Large frequency shifts are needed for conversion between optical and telecommunication frequencies, while smaller shifts are useful for frequency-multiplexing quantum systems, in the same way that wavelength division multiplexing is used in classical communications. Here we demonstrate frequency and bandwidth conversion of single photons in a room-temperature diamond quantum memory. Heralded 723.5 nm photons, with 4.1 nm bandwidth, are stored as optical phonons in the diamond via a Raman transition. Upon retrieval from the diamond memory, the spectral shape of the photons is determined by a tunable read pulse through the reverse Raman transition. We report central frequency tunability over 4.2 times the input bandwidth, and bandwidth modulation between 0.5 and 1.9 times the input bandwidth. Our results demonstrate the potential for diamond, and Raman memories in general, as an integrated platform for photon storage and spectral conversion.