Broadband quadrature-squeezed vacuum and nonclassical photon number correlations from a nanophotonic device
arXiv:1904.07833 · doi:10.1126/sciadv.aba9186
Abstract
We report demonstrations of both quadrature squeezed vacuum and photon number difference squeezing generated in an integrated nanophotonic device. Squeezed light is generated via strongly driven spontaneous four-wave mixing below threshold in silicon nitride microring resonators. The generated light is characterized with both homodyne detection and direct measurements of photon statistics using photon number-resolving transition edge sensors. We measure ~dB of broadband quadrature squeezing (~dB inferred on-chip) and ~dB of photon number difference squeezing (~dB inferred on-chip). Nearly-single temporal mode operation is achieved, with measured raw unheralded second-order correlations as high as . Multi-photon events of over 10 photons are directly detected with rates exceeding any previous quantum optical demonstration using integrated nanophotonics. These results will have an enabling impact on scaling continuous variable quantum technology.
arXiv commentMinor revisions, and Fig. 5 corrected; Now published in Science Advances
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