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Transmission Experiment of Quantum Keys over 50 km Using High-Performance Quantum-Dot Single-Photon Source at 1.5 µm Wavelength
- Source :
- Applied Physics Express. 3:092802
- Publication Year :
- 2010
- Publisher :
- IOP Publishing, 2010.
-
Abstract
- We have developed a high-performance single-photon source (SPS) operating at 1.5 µm wavelength. The source is an InAs/InP quantum dot with a horn-shaped nanostructure. A resonant excitation to the p-shell state helps achieve a single-photon efficiency of 5.8% after coupling into a single-mode fiber with a second-order correlation value of g(2)(0)~0.055. The performance of the source has been assessed by integrating it into a conventional quantum key distribution system. We have successfully transmitted secure keys over a 50 km commercial fiber, exceeding the previously reported range for an SPS operating below 1.3 µm.
Details
- ISSN :
- 18820786 and 18820778
- Volume :
- 3
- Database :
- OpenAIRE
- Journal :
- Applied Physics Express
- Accession number :
- edsair.doi...........ec320ff672834d57f794d96bd81a05fe