Multi-photon detection using a conventional superconducting nanowire single-photon detector

Cahall, Clinton; Nicolich, Kathryn L.; Islam, Nurul T.; Lafyatis, Gregory P.; Miller, Aaron J.; Gauthier, Daniel J.; Kim, Jungsang

doi:10.1364/optica.4.001534

Cited by 110 publications

(79 citation statements)

References 7 publications

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“…For example, the blue traces were separated at t = 3 ns, making three-and higher-photon events distinguishable. We processed the pulses' rise times and slew rates and found correlations to photon numbers as well, which agreed with recent reports on the photon-numberdependent slew rates [28] (see Supplementary Fig. S7).…”

supporting

confidence: 87%

Resolving Photon Numbers Using a Superconducting Nanowire with Impedance-Matching Taper

et al. 2020

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Time-and number-resolved photon detection is crucial for photonic quantum information processing. Existing photon-number-resolving (PNR) detectors usually have limited timing and dark-count performance or require complex fabrication and operation. Here we demonstrate a PNR detector at telecommunication wavelengths based on a single superconducting nanowire with an integrated impedance-matching taper. The prototyping device was able to resolve up to five absorbed photons and had 16.1 ps timing jitter, <2 c.p.s. device dark count rate, ∼86 ns reset time, and 5.6% system detection efficiency (without cavity) at 1550 nm. Its exceptional distinction between single-and two-photon responses is ideal for coincidence counting and allowed us to directly observe bunching of photon pairs from a single output port of a Hong-Ou-Mandel interferometer. This detector architecture may provide a practical solution to applications that require high timing resolution and few-photon discrimination.

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confidence: 87%

Resolving Photon Numbers Using a Superconducting Nanowire with Impedance-Matching Taper

et al. 2020

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“…As a triggering detector, a traditional SNSPD cannot distinguish the photon number. However, with a special readout circuit, SNSPD shows the potential of PNR [110]. Several SNSPDs with quasi-PNR ability were reported on the basis of different space multiplexing methods [99,111,112], and a PNR of up to 24 could be observed [113].…”

Section: Photon Number Resolvability (Pnr)mentioning

confidence: 99%

Superconducting nanowire single-photon detectors for quantum information

You

2020

Nanophotonics

147

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AbstractThe superconducting nanowire single-photon detector (SNSPD) is a quantum-limit superconducting optical detector based on the Cooper-pair breaking effect by a single photon, which exhibits a higher detection efficiency, lower dark count rate, higher counting rate, and lower timing jitter when compared with those exhibited by its counterparts. SNSPDs have been extensively applied in quantum information processing, including quantum key distribution and optical quantum computation. In this review, we present the requirements of single-photon detectors from quantum information, as well as the principle, key metrics, latest performance issues, and other issues associated with SNSPD. The representative applications of SNSPDs with respect to quantum information will also be covered.

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“…Furthermore, recent advancements in detector technology (see, e.g., Refs. [83][84][85][86]) offer new photon counters to which our detector-agnostic framework is also readily applicable.…”

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confidence: 99%

Detector-Agnostic Phase-Space Distributions

et al. 2020

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The representation of quantum states via phase-space functions constitutes an intuitive technique to characterize light. However, the reconstruction of such distributions is challenging as it demands specific types of detectors and detailed models thereof to account for their particular properties and imperfections. To overcome these obstacles, we derive and implement a measurement scheme that enables a reconstruction of phase-space distributions for arbitrary states whose functionality does not depend on the knowledge of the detectors, thus defining the notion of detector-agnostic phase-space distributions. Our theory presents a generalization of wellknown phase-space quasiprobability distributions, such as the Wigner function. We implement our measurement protocol, using state-of-the-art transition-edge sensors without performing a detector characterization. Based on our approach, we reveal the characteristic features of heralded single-and two-photon states in phase space and certify their nonclassicality with high statistical significance.

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Multi-photon detection using a conventional superconducting nanowire single-photon detector

Cited by 110 publications

References 7 publications

Resolving Photon Numbers Using a Superconducting Nanowire with Impedance-Matching Taper

Resolving Photon Numbers Using a Superconducting Nanowire with Impedance-Matching Taper

Superconducting nanowire single-photon detectors for quantum information

Detector-Agnostic Phase-Space Distributions

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