On-demand single-photon source for 1.3 μm telecom fiber

Ward, M. B.; Karimov, O. Z.; Unitt, D. C.; Yuan, Z. L.; See, P.; Gevaux, D. G.; Shields, A. J.; Atkinson, P.; Ritchie, D. A.
May 2005
Applied Physics Letters;5/16/2005, Vol. 86 Issue 20, p201111
Academic Journal
We demonstrate an on-demand single-photon source that is compatible with standard telecom optical fiber. Through careful control of the critical strains of InAs/GaAs self-assembled quantum dots, we produce a microcavity sample with a low density of large dots emitting into the fiber-optic transmission band at 1.3 μm. The second-order correlation function of the source reveals a strong suppression in the rate of multiphoton pulses at both 5 K and above 30 K. The source may be useful for fiber-optic-based single-photon applications, such as quantum metrology, quantum communications, and distributed quantum computing.


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