Power-efficient production of photon pairs in a tapered chalcogenide microwire

Abstract

Using tapered fibers of As2Se3 chalcogenide glass, we produce photon pairs at telecommunication wavelengths with low pump powers. We found maximum coincidences-to-accidentals ratios of $2.13\pm 0.07$ for degenerate pumping with 3.2 μW average power, and $1.33\pm 0.03$ for non-degenerate pumping with 1.0 μW and 1.5 μW average power of the two pumps. Our results show that the ultrahigh nonlinearity in these microwires could allow single-photon pumping to produce photon pairs, enabling the production of large entangled states, heralding of single photons after lossy transmission, and photonic quantum information processing with nonlinear optics.

5 pages, 6 figures. Updated to published version

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Cited by in corpus (1)

• Optimization of periodic single-photon sources based on combined multiplexing