Mid-infrared coincidence measurements on twin photons at room temperature

M. Mancinelli, A. Trenti, S. Piccione, G. Fontana, Jeppe Seidelin Dam, Peter Tidemand-Lichtenberg, Christian Pedersen, L. Pavesi

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Quantum measurements using single-photon detectors are opening interesting new perspectives in diverse fields such as remote sensing, quantum cryptography and quantum computing. A particularly demanding class of applications relies on the simultaneous detection of correlated single photons. In the visible and near infrared wavelength ranges suitable single-photon detectors do exist. However, low detector quantum efficiency or excessive noise has hampered their mid-infrared (MIR) counterpart. Fast and highly efficient single-photon detectors are thus highly sought after for MIR applications. Here we pave the way to quantum measurements in the MIR by the demonstration of a room temperature coincidence measurement with non-degenerate twin photons at about 3.1 mu m. The experiment is based on the spectral translation of MIR radiation into the visible region, by means of efficient up-converter modules. The up-converted pairs are then detected with low-noise silicon avalanche photodiodes without the need for cryogenic cooling.
Original languageEnglish
Article number15184
JournalNature Communications
Number of pages8
Publication statusPublished - 2017

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