Current distribution in a parallel configuration superconducting strip-line detector

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

doi:10.1063/1.4813087

Cited by 14 publications

(27 citation statements)

References 14 publications

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“…The pulse heights of output signals of Type-II widely distribute, as is expected from the initial bias current distribution determined by the London theory [52][53]. Circuit simulations reveal that the wide distribution of output pulse heights is caused by the redistribution of the bias current among parallel strips after each ion impact, as mentioned before.…”

Section: Comparisons Of Type-i and Type-ii Parallel Configurationsmentioning

confidence: 62%

“…After some detection events, a non-uniform distribution of the bias current is established among the strips in the block with the consequence that some strips are biased at lower and others at higher currents compared to the initial bias current distribution. In recent papers [52][53], both the current recovery after detection events and the current redistribution among parallel strips after output pulse triggering have been investigated in order to gain insight into the factors governing the output pulse amplitude and explain the considerable spread in the pulse amplitude distribution [13], [46]. The effect of the current redistribution among parallel strips after each detection event could also explain why the efficiency of the detectors it does not increase at increasing of the sensitive area as pointed out in [52].…”

Section: The Single-strip-switch Regimementioning

confidence: 99%

“…In recent papers [52][53], both the current recovery after detection events and the current redistribution among parallel strips after output pulse triggering have been investigated in order to gain insight into the factors governing the output pulse amplitude and explain the considerable spread in the pulse amplitude distribution [13], [46]. The effect of the current redistribution among parallel strips after each detection event could also explain why the efficiency of the detectors it does not increase at increasing of the sensitive area as pointed out in [52]. The experiments used a nano-optical technique, which probed individual nano-strips in an especially designed SSPD with intense laser shots.…”

Section: The Single-strip-switch Regimementioning

confidence: 99%

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Superconducting nano-strip particle detectors

Cristiano

Ejrnæs

Casaburi

et al. 2015

Supercond. Sci. Technol.

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We review progress in the development and applications of superconducting nano-strip particle detectors. Particle detectors based on superconducting nano-strips stem from the parent devices developed for single-photon detection (SSPD) and share with them ultrafast response time (sub-nanosecond) and operation at a relatively high temperature (2 -5 K) with respect to other cryogenic detectors. SSPDs have been used in the detection of electrons, neutral and charged ions, and biological macromolecules. Nevertheless, the development of superconducting nano-strip particle detectors has been mainly driven by the use in time-of-flight mass spectrometers (TOF-MS) where the goal of 100% efficiency at large mass values can be obtained. A special emphasis will be given to this case, reporting the great progress achieved which permits to overcome the limitations of existing mass spectrometers represented by low detection efficiency at large masses and charge/mass ambiguity and could represent a breakthrough in the field. In this review article we will introduce the device concept and detection principle, stressing the peculiarities of the nano-strip particle detector as well as its similarities with the photon detector. The development of the parallel strip configuration is introduced and extensively discussed, since it has contributed to significant progress in TOF-MS applications.

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Section: Comparisons Of Type-i and Type-ii Parallel Configurationsmentioning

confidence: 62%

Section: The Single-strip-switch Regimementioning

confidence: 99%

Section: The Single-strip-switch Regimementioning

confidence: 99%

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Superconducting nano-strip particle detectors

Cristiano

Ejrnæs

Casaburi

et al. 2015

Supercond. Sci. Technol.

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“…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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“…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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Current distribution in a parallel configuration superconducting strip-line detector

Cited by 14 publications

References 14 publications

Superconducting nano-strip particle detectors

Superconducting nano-strip particle detectors

Superconducting Optoelectronic Circuits for Neuromorphic Computing

Room-temperature-deposited dielectrics and superconductors for integrated photonics

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