A5010470735- Physics of Superconductivity and Magnetism
- Superconducting and THz Device Technology
- Infrastructure Maintenance and Monitoring
- Advanced Memory and Neural Computing
- Structural Health Monitoring Techniques
- Quantum and electron transport phenomena
- Superconductivity in MgB2 and Alloys
- Neural Networks and Reservoir Computing
- Ferroelectric and Negative Capacitance Devices
- Structural Load-Bearing Analysis
- Image Processing and 3D Reconstruction
- Ultrasound and Hyperthermia Applications
- Ultrasound Imaging and Elastography
- Ultrasonics and Acoustic Wave Propagation
- Structural Engineering and Vibration Analysis
- 3D Surveying and Cultural Heritage
- Particle accelerators and beam dynamics
- Concrete Corrosion and Durability
- Remote Sensing and LiDAR Applications
- Thermal Radiation and Cooling Technologies
- Radiation Detection and Scintillator Technologies
- Concrete Properties and Behavior
- Railway Engineering and Dynamics
- GaN-based semiconductor devices and materials
- Advanced Measurement and Detection Methods
Massachusetts Institute of Technology
2020-2024
University of Perugia
2023-2024
Carnegie Mellon University
2020
As the limits of traditional von Neumann computing come into view, brain's ability to communicate vast quantities information using low-power spikes has become an increasing source inspiration for alternative architectures. Key success these largescale neural networks is a power-efficient spiking element that scalable and easily interfaced with control electronics. In this work, we present fabricated from superconducting nanowires pulse energies on order ∼10 aJ. We demonstrate device...
The development of superconducting electronics based on nanocryotrons has been limited so far to few device circuits, in part due the lack standard and robust logic cells. Here, we introduce experimentally demonstrate designs for a set nanocryotron-based building blocks that can be configured combined implement memory functions. devices were fabricated by patterning single layer niobium nitride measured liquid helium wide range operating points. tests show 10 − 4 bit error rates with above ±...
Scaling up cryogenic systems, like arrays of superconducting nanowire single-photon detectors (SNSPDs), requires developing coprocessors to minimize the number cables exiting cryostat. This work addresses this challenge by demonstrating ability read out, process, encode, and store data from SNSPDs using integrated electronics. The authors design a digital counter based on nanocryotrons---three-terminal devices---to perform signal processing digitization at low temperatures. These results...
We present a design for superconducting nanowire binary shift register, which stores digital states in the form of circulating supercurrents high-kinetic-inductance loops. Adjacent loops are connected with nanocryotrons, three-terminal electrothermal switches, and fed an alternating two-phase clock to synchronously transfer state between A two-loop serial-input register was fabricated thin-film NbN bit error rate less than 10−4 achieved, when operated at maximum frequency 83 MHz out-of-plane...
Abstract Neuromorphic computing would benefit from the utilization of improved customized hardware. However, translation neuromorphic algorithms to hardware is not easily accomplished. In particular, building superconducting systems requires expertise in both physics and theoretical neuroscience, which makes such design particularly challenging. this work, we aim bridge gap by presenting a tool methodology translate algorithmic parameters into circuit specifications. We first show...
Abstract Time-dependent phenomena, such as creep of concrete, induce stress/strain redistributions in post-tensioned concrete bridges that must be taken into account during their design. The underestimation time-dependent effects can negatively influence the load-deformation behavior this bridge typology, leading to unexpected deformations deck, serviceability issues, and collapses. Numerical models able simulate phenomena should also used properly conduct structural assessment existing...
We report on the first implementation of a long-range wake-up receiver (WuRx) enabled by an aggressively scaled 100 nm thick aluminum nitride transducer that occupies area only <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$100\ \mu \mathrm{m}\ \times\ 100\ \mathrm{m}$</tex> . This piezoelectric Nanoscale Ultrasound Transducer (pNUT) offers same sensitivity and characteristic impedance its microscale counterparts but enables "dust-like" WuRx...
Efficiently simulating large circuits is crucial for the broader use of superconducting nanowire-based electronics. However, current simulation tools this technology are not adapted to scaling circuit size and complexity. We focus on multilayered heater-nanocryotron (hTron), a promising switch used in applications such as nanowire single-photon detector (SNSPD) readout. Previously, hTron was modeled using traditional finite-element methods (FEM), which fall short systems at larger scale. An...
This work presents an analysis of the first mmWaves-operating Cross-sectional Lamé Mode Resonators (CLMRs), investigating intrinsic quality factor limit technology. By leveraging Finite Element Modeling-simulated energy distributions in piezoelectric and metal layer, accurate matching theoretical experimental is achieved, thus identifying main source CLMR performance degradation 20 to 35 GHz frequency range. Furthermore, excellent factors are recorded, achieving largest product (f <inf...
Superconducting thin-film electronics are attractive for their low power consumption, fast operating speeds, and ease of interface with cryogenic systems such as single-photon detector arrays, quantum computing devices. However, the lack a reliable superconducting two-terminal asymmetric device, analogous to semiconducting diode, limits development power-handling circuits, fundamental scaling up these technologies. Existing efforts date have been limited single-diode proofs principle lacked...
The scaling of superconducting nanowire-based devices to larger arrays is often limited by the cabling required interface with each device. Cryogenic integrated circuits constructed from nanowire cryotrons, or nanocryotrons, can address this limitation performing signal processing on chip. In study, we characterize key performance metrics nanocryotron elucidate its potential as a logical element in cryogenic and develop an electro-thermal model connect material parameters device performance....
Roadway bridges can be subjected to several pathologies affecting their structural performance during operational conditions. Among others, slow deformation phenomena due landslides often represent the primary cause of onset damage and collapse mechanisms. The timely identification on viaducts, as well evaluation extent evolution over time, are therefore crucial importance for preserving safety conditions road networks. In common practice, preliminary analysis could carried out large...
We present a design for superconducting nanowire binary shift register, which stores digital states in the form of circulating supercurrents high-kinetic-inductance loops. Adjacent loops are connected with nanocryotrons, three terminal electrothermal switches, and fed an alternating two-phase clock to synchronously transfer state between A two-loop serial-input register was fabricated thin-film NbN achieved bit error rate less than $10^{-4}$, operating at maximum frequency $83\,\mathrm{MHz}$...