Fast, High-Efficiency PNR Parallel SNSPD
The results of new research from a collaboration between ID Quantique and GAP at the University of Geneva has been recently published in Physical Review Applied. This paper, titled “Fast High-Efficiency Photon-Number-Resolving Parallel Superconducting Nanowire Single-Photon Detector” shows a high-performance SNSPD, based on a novel parallel design enabling fast, high-efficiency photon-number resolution (PNR). The paper also demonstrates how the detector can be used to reconstruct the photon-number statistics of a light source. This research represents a significant advancement in the field of photon-number-resolving, single-photon detectors. This technology provides broad applications in quantum optics ranging from photonic quantum computing to improved, heralded, single-photon sources.
Here is the abstract of this paper:
Photon-number-resolving (PNR), single-photon detectors are an enabling technology in many areas, such as photonic quantum computing, non-classical light-source characterization, and quantum imaging. Here, we demonstrate high-efficiency PNR detectors using a parallel superconducting nanowire single-photon-detector (P-SNSPD) architecture that does not suffer from crosstalk between the pixels and that is free of latching.
The behavior of the detector is modeled and used to predict the possible outcomes given a certain number of incoming photons. We apply our model to a four-pixel P-SNSPD with a system detection efficiency of 92.5%. We also demonstrate how this detector allows reconstructing the photon-number statistics of a coherent source of light, which paves the way towards the characterization of the photon statistics of other types of light source using a single detector.
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