Experimental evidence of photoinduced vortex crossing in current carrying superconducting strips

Casaburi, A.; Heath, Robert M.; Ejrnæs, M.; Nappi, C.; Cristiano, R.; Hadfield, Robert H.

doi:10.1103/physrevb.92.214512

Cited by 8 publications

(20 citation statements)

References 32 publications

(41 reference statements)

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“…More recent experiments [ 42 ] and calculations [ 43 , 44 , 45 , 46 ] show that this process is also aided by Abrikosov vortices—While the potential barrier for a vortex entry might be too high in the equilibrium state, reduction of the order parameter also reduces the nucleation energy and individual vortices might enter from the wire edges, or vortex-anti-vortex pairs can form and separate. These vortices move across the wire width due to Lorentz force caused by the flowing current and cause voltage transients, further reduce the order parameter or cause phase slips [ 47 , 48 , 49 , 50 , 51 ] that can contribute to the device dark counts.…”

Section: Snspd Concept Origins Operation and Metricsmentioning

confidence: 99%

Unconventional Applications of Superconducting Nanowire Single Photon Detectors

et al. 2020

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Superconducting nanowire single photon detectors are becoming a dominant technology in quantum optics and quantum communication, primarily because of their low timing jitter and capability to detect individual low-energy photons with high quantum efficiencies. However, other desirable characteristics, such as high detection rates, operation in cryogenic and high magnetic field environments, or high-efficiency detection of charged particles, are underrepresented in literature, potentially leading to a lack of interest in other fields that might benefit from this technology. We review the progress in use of superconducting nanowire technology in photon and particle detection outside of the usual areas of physics, with emphasis on the potential use in ongoing and future experiments in nuclear and high energy physics.

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Section: Snspd Concept Origins Operation and Metricsmentioning

confidence: 99%

Unconventional Applications of Superconducting Nanowire Single Photon Detectors

et al. 2020

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“…The detection mechanism of an SNSPD depends on the absorption of a photon locally breaking Cooper pairs in the superconductor, leading to the production of a region of normal metal, referred to as a "hot spot". With sufficient bias current, the absorption of a photon by the SNSPD will result in a voltage pulse [22,[69][70][71][72][73][74][75][76][77][78][79]. The required wire dimensions for this process depend on the wavelength of the light and the material properties.…”

Section: Integration With Single-photon Detectorsmentioning

confidence: 99%

Room-temperature-deposited dielectrics and superconductors for integrated photonics

Shainline¹,

Buckley²,

Nader³

et al. 2017

Opt. Express

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We present an approach to fabrication and packaging of integrated photonic devices that utilizes waveguide and detector layers deposited at near-ambient temperature. All lithography is performed with a 365 nm i-line stepper, facilitating low cost and high scalability. We have shown low-loss SiN waveguides, high-Q ring resonators, critically coupled ring resonators, 50/50 beam splitters, Mach-Zehnder interferometers (MZIs) and a process-agnostic fiber packaging scheme. We have further explored the utility of this process for applications in nonlinear optics and quantum photonics. We demonstrate spectral tailoring and octave-spanning supercontinuum generation as well as the integration of superconducting nanowire single photon detectors with MZIs and channel-dropping filters. The packaging approach is suitable for operation up to 160 • C as well as below 1 K. The process is well suited for augmentation of existing foundry capabilities or as a stand-alone process.

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“…Also shown in Ref. [131] is the fact that a PND can trap flux after a photon absorption event. To utilize this to extend the integration time to infinity, the geometry of In addition to utilizing flux trapping to extend the integration time, one may design the L/R time constant to achieve desired performance.…”

Section: Appendix C: Integration Time and Refractory Periodmentioning

confidence: 99%

“…Recent studies [130,131] reveal that nonuniform current distribution in the PND as drawn in Fig. 2(a) is problematic for numberresolving photon detection.…”

Section: Appendix C: Integration Time and Refractory Periodmentioning

confidence: 99%

Superconducting Optoelectronic Circuits for Neuromorphic Computing

et al. 2017

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Neural networks have proven effective for solving many difficult computational problems. Implementing complex neural networks in software is very computationally expensive. To explore the limits of information processing, it will be necessary to implement new hardware platforms with large numbers of neurons, each with a large number of connections to other neurons. Here we propose a hybrid semiconductor-superconductor hardware platform for the implementation of neural networks and large-scale neuromorphic computing. The platform combines semiconducting few-photon light-emitting diodes with superconducting-nanowire single-photon detectors to behave as spiking neurons. These processing units are connected via a network of optical waveguides, and variable weights of connection can be implemented using several approaches. The use of light as a signaling mechanism overcomes fanout and parasitic constraints on electrical signals while simultaneously introducing physical degrees of freedom which can be employed for computation. The use of supercurrents achieves the low power density necessary to scale to systems with enormous entropy. The proposed processing units can operate at speeds of at least 20 MHz with fully asynchronous activity, light-speed-limited latency, and power densities on the order of 1 mW/cm 2 for neurons with 700 connections operating at full speed at 2 K. The processing units achieve an energy efficiency of ≈ 20 aJ per synapse event. By leveraging multilayer photonics with deposited waveguides and superconductors with feature sizes > 100 nm, this approach could scale to systems with massive interconnectivity and complexity for advanced computing as well as explorations of information processing capacity in systems with an enormous number of information-bearing microstates.

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Experimental evidence of photoinduced vortex crossing in current carrying superconducting strips

Cited by 8 publications

References 32 publications

Unconventional Applications of Superconducting Nanowire Single Photon Detectors

Unconventional Applications of Superconducting Nanowire Single Photon Detectors

Room-temperature-deposited dielectrics and superconductors for integrated photonics

Superconducting Optoelectronic Circuits for Neuromorphic Computing

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