Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"superconducting nanowires"”.
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Microwave Response in Superconducting Nanowires
We fabricate superconducting wires using molecular templating technique to study their transport properties when exposed to microwave radiation (MW), at cryogenic temperatures. Our wires have a diameter on the order of the zero temperature coherence length, which makes them quasi-one-dimensional at …
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Fabrication and measurement of superconducting nanowires
… that could be employed to produce sub-100nm wide superconducting nanowires. Nanowires of niobium and Y Ba\(_2\)Cu\(_3\)O\(_{7-δ}\) (YBCO) were fabricated in thin films using focused gallium ion beam milling (FIB) to a range of widths (100nm-300nm). A procedure was developed to controllably reduce …
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Microwave engineering in superconducting nanowires for single-photon detection
… sensing. With their exceptional performance, superconducting nanowire single-photon detectors (SNSPDs) have emerged as the leading single-photon counting technology at infrared wavelengths. Conventionally, the superconducting nanowires are treated as lumped circuit elements, and their …
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Microwave response of nonlinear oscillations in resistively shunted superconducting nanowires
Many superconducting technologies such as rapid single flux quantum computing (RSFQ) and superconducting quantum interference devices (SQUIDs) rely on the modulation of nonlinear dynamics in Josephson junctions for functionality. More recently, however, superconducting devices have been developed …
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Switching Current Distributions of Superconducting Nanowires: Evidence of Quantum Phase Slip Events
… topological fluctuation events that carry the superconducting order-parameter field between distinct current carrying states. Owing to these phase slips low-dimensional superconductors acquire electrical resistance. In quasi-one-dimensional nanowires it is well known that at higher temperatures …
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Probing quantum phase slips in superconducting nanowires modified using high bias voltage pulses
… quantum regime, we can alter properties of the nanowires and see if the response is consistent with the expectations of the quantum model. To do this we employ an in-situ modification technique using high bias voltage pulses. Using these pulses, we can change resistance, critical temperature, …
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Superconducting nanowire electronics for alternative computing
… alternative computing system using superconducting nanowires. Although traditionally operated as single photon detectors, superconducting nanowires host a suite of attractive characteristics that have recently inspired their use in digital circuit applications for amplification, …
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Superconducting Nanowire Technology for Microwave and Photonics Applications
… roadblocks. As the qubit count increases, superconducting quantum processors require an increasing number of control and readout electronic devices, which are incompatible at scale with the performance of dilution refrigerators. Photonic-based platforms struggle with integration issues due …
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Timing performance of superconducting nanowire single-photon detectors
Superconducting nanowire single-photon detectors (SNSPDs) are becoming increasingly popular for applications in quantum information and long-distance communication. While the detection efficiency of SNSPDs has significantly improved over time, their timing performance has largely remained …
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Dissipative processes in superconducting nanodevices: nanowire-resonators, shunted nanowires, and graphene proximity junctions
The topic of superconducting nanowires has recently been an interesting field of research which has included the study of the superconductor to insulator transition (SIT), the observation of macroscopic quantum behavior such as quantum phase slips (QPS), and the potential use of nanowires as …
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Transport studies on proximity-coupled bismuth selenide
… This allows us to probe and manipulate the superconducting states of Bi2Se3 and therefore test predictions for what can happen at the intersection of superconductivity and magnetism in topological insulators. First, we study how superconductivity can persist in strong magnetic fields in …
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Efficient simulation of Large-Scale Superconducting Nanowire Circuits
As the size of superconducting nanowire devices increases and the influence of second-order effects, such as thermal or electrostatic coupling, becomes more significant, the complexity of models required to accurately and efficiently simulate the device’s behavior becomes more challenging. …
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Measurements of superconducting phase gradients by a nanowire quantum interference device templated by DNA molecules
… We have developed a process to make superconducting nanowires templated by DNA molecules that are homogeneous, are less than 10 nm in diameter, make seamless contacts the leads, and become superconducting at low temperatures. Our method involves isolating single DNA strands stretched …
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Superconducting Electronics for Breakthrough Starshot Communications
… weight, and power constraints of the mission, superconducting electronics should be considered for onboard processing and interfacing with the communications system. Previous research has shown that superconducting nanowire electronics consume over 100𝗑 less switching energy than 7 nm CMOS …
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Scaling of Nanocryotron Superconducting Logic
… presents the design and characterization of a superconducting shift register based on nanocryotrons. Such a shift register has applications in nanocryotron circuit testing as well as integrated readout and memory for high count rate imagers based on superconducting nanowire single photon …
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Digital and Microwave Superconducting Electronics and Experimental Apparatus
The lack of a high-performance and scalable superconducting memory has been a persistent issue in the field of superconducting computing for decades. There have been many attempts at addressing this issue; however, to-date no technology has been able to completely satisfy this demand. In this work …
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Nano-optical studies of superconducting nanowire single-photon detectors
uperconducting single-photon detectors based on superconducting nanowires offer broadband single-photon sensitivity, from visible to mid-infrared wavelengths. They have attracted particular attention due to their promising performance at telecommunications wavelengths. The additional benefits of …
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Fabrication and Electronic Transport properties of Underdoped High Temperature Superconductor Nanowires
… to help unravel the mysteries surrounding the superconducting and pseudogap states in the high-Tc cuprates, we have measured the electronic transport properties of underdoped, high-Tc nanowires and nanostructures. The sizes of the samples involved allow for the investigation of the electronic …
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Superconductor-insulator transition in quasi-one-dimensional nanowires
We have studied a large group of superconducting MoGe nanowires fabricated by a molecular templating technique. A well-defined superconductor-insulator transition (SIT) is observed in homogeneous wires with lengths less than ~200 nm. The total normal state resistance of the wire is found to be the …