Quantum Nanostructures and
Nanofabrication Group

Prof. Karl K. Berggren and Dr. P. Donald Keathley

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New Publication  “On-chip sampling of optical fields with attosecond resolution”

New Publication “On-chip sampling of optical fields with attosecond resolution”

Apr 15, 2021 | News Articles

We demonstrate an on-chip, optoelectronic device capable of sampling arbitrary, low-energy, near-infrared waveforms under ambient conditions with sub-optical-cycle resolution. Our detector uses field-driven photoemission from resonant nanoantennas to create attosecond...
New Publication  “Impact of DC bias on weak optical-field-driven electron emission in nano-vacuum-gap detectors”

New Publication “Impact of DC bias on weak optical-field-driven electron emission in nano-vacuum-gap detectors”

Feb 26, 2021 | News Articles

In this work, we investigate multiphoton and optical field tunneling emission from metallic surfaces with nanoscale vacuum gaps. Using time-dependent Schrödinger equation (TDSE) simulations, we find that the properties of the emitted photocurrent in such systems can...
New Publication  “Compact and Tunable Forward Coupler Based on High-Impedance Superconducting Nanowires”

New Publication “Compact and Tunable Forward Coupler Based on High-Impedance Superconducting Nanowires”

Feb 25, 2021 | News Articles

Developing compact, low-dissipation, cryogenic-compatible microwave electronics is essential for scaling up low-temperature quantum computing systems. In this paper, we demonstrate an ultracompact microwave directional forward coupler based on high-impedance slow-wave...
New Publication  “Superconducting MoN thin films prepared by DC reactive magnetron sputtering for nanowire single-photon detectors”

New Publication “Superconducting MoN thin films prepared by DC reactive magnetron sputtering for nanowire single-photon detectors”

Feb 2, 2021 | News Articles

We present a comprehensive study of molybdenum nitride (MoN) thin film deposition using direct current reactive magnetron sputtering. We have investigated the effect of various deposition conditions on the superconducting and electrical properties of the films....
New Publication  “Enhancing the performance of superconducting nanowire-based detectors with high-filling factor by using variable thickness ”

New Publication “Enhancing the performance of superconducting nanowire-based detectors with high-filling factor by using variable thickness ”

Feb 2, 2021 | News Articles

Current crowding at bends of superconducting nanowire single-photon detector (SNSPD) is one of the main factors limiting the performance of meander-style detectors with large filling factors. In this paper, we propose a new concept to reduce the influence of the...
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Recent Posts

  • New Publication: A superconducting full-wave bridge rectifier
  • Dr Keathley’s Talk on Nanoscale Petahertz Electronics now available
  • QNN Winter 2025 Newsletter
  • Karl Berggren named faculty head of electrical engineering in EECS
  • New Publication: On-chip petahertz electronics for single-shot phase detection

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