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Updated: May 23, 2026

Implementation of a Reference Interferometer for Nanodetection
Published on: April 26, 2014
Matthew Bradford1, Kenechukwu C Obi, Jung-Tsung Shen
1Department of Electrical and Systems Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, USA.
We developed a new method for efficient single-photon frequency conversion using quantum interference in a Sagnac interferometer. This technique enables precise up- or down-conversion of optical frequencies at the single-photon level with high efficiency.
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