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Efficient single-photon frequency conversion using a Sagnac interferometer
Matthew Bradford1, Kenechukwu C Obi, Jung-Tsung Shen
1Department of Electrical and Systems Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, USA.
Physical Review Letters
|April 3, 2012
Abstract:
We propose a scheme for efficient optical frequency conversion at the single-photon power level. The scheme exploits the quantum interference of single-photon states at a three-level quantum emitter coupled to a Sagnac interferometer. We show that this device can achieve single-photon frequency up- or down-conversion with near unity efficiency.

