Journal
PHYSICAL REVIEW LETTERS
Volume 120, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.243601
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Funding
- NSF under the EFRI ACQUIRE program [1640959]
- Air Force Office of Scientific Research [FA9550-18-1-0081]
- Department of Defense (DoD) through the National Defense Science & Engineering Graduate Fellowship (NDSEG) Program
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Single atoms and atomlike defects in solids are ideal quantum light sources and memories for quantum networks. However, most atomic transitions are in the ultraviolet-visible portion of the electromagnetic spectrum, where propagation losses in optical fibers are prohibitively large. Here, we observe for the first time the emission of single photons from a single Er3+ ion in a solid-state host, whose optical transition at 1.5 mu m is in the telecom band, allowing for low-loss propagation in optical fiber. This is enabled by integrating Er3+ ions with silicon nanophotonic structures, which results in an enhancement of the photon emission rate by a factor of more than 650. Dozens of distinct ions can be addressed in a single device, and the splitting of the lines in a magnetic field confirms that the optical transitions are coupled to the electronic spin of the Er3+ ions. These results are a significant step towards long-distance quantum networks and deterministic quantum logic for photons based on a scalable silicon nanophotonics architecture.
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