On-chip detection of non-classical light by scalable integration of single-photon detectors

By F. Najafi, Jacob Mower, Nicholas Christopher Harris, F. Bellei, A. Dane, Catherine Lee, Xiaolong Hu, P. Kharel, F. Marsili, S. Assefa and 2 more. Nature Communications, 2014

310 citations recorded by the source corpus.

Photonic-integrated circuits have emerged as a scalable platform for complex quantum systems. A central goal is to integrate single-photon detectors to reduce optical losses, latency and wiring complexity associated with off-chip detectors. Superconducting nanowire single-photon detectors (SNSPDs) are particularly attractive because of high detection efficiency, sub-50-ps jitter and nanosecond-scale reset time. However, while single detectors have been incorporated into individual waveguides, the system detection efficiency of multiple SNSPDs in one photonic circuit—required for scalable quantum photonic circuits—has been limited to <0.2%. Here we introduce a micrometer-scale flip-chip process that enables scalable integration of SNSPDs on a range of photonic circuits. Ten low-jitter detectors are integrated on one circuit with 100% device yield. With an average system detection efficiency beyond 10%, and estimated on-chip detection efficiency of 14–52% for four detectors operated simultaneously, we demonstrate, to the best of our knowledge, the first on-chip photon correlation measurements of non-classical light. The integration of single-photon detectors, as superconducting nanowire single-photon detectors, in photonic-integrated circuits is a goal of quantum information science. Here, Najafi et al.introduce a micrometer-scale flip-chip process enabling such a integration in a scalable way.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/71d7db8b2c2b207213a83863793410b5b6ebf5d9

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Citations in the corpus

Metropolitan quantum key distribution with silicon photonics (2017, background): “Furthermore, single photon detectors have been integrated into silicon photonics [50], showing the possibility of a compact QKD receiver.”
Integrated photonic quantum technologies (2019, unknown): “2j) [61].”
Quantum nanophotonics in diamond [Invited] (2016, background): “To increase the detection efficiency of single photons emitted by defects in diamond, efforts are underway to fabricate superconducting nanowire single-photon detectors (SNSPDs) directly on diamond or to integrate them with hybrid waveguide architectures [207,208].”
On-Chip Optical Squeezing (2013, background): “Many efforts have been directed at the development of on-chip singlephoton light sources [9–14], detectors [15], and logic gates [8].”
Advances in quantum cryptography (2019, unknown): “Moreover, superconducting nanowire single photon detectors (SNSPDs) have been integrated into silicon photonics using a pick-and-place method, paving the way for a possible monolithic compact QKD receiver with single photon counting capabilities [301].”
Superconducting nanowire single-photon detectors for quantum information (2020, background): “[195] Najafi F, Mower J, Harris N C, et al.”