Quantum Nanostructures and
Nanofabrication Group

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

The frontier of information processing lies in nanoscience and nanotechnology research. At the nanoscale, materials and structures can be engineered to exhibit interesting new properties, some based on quantum mechanical effects. Our research focuses on developing nanofabrication technology at the few-nanometer length-scale. We use these technologies to push the envelope of what is possible with photonic and electrical devices, focusing in particular on superconductive and free-electron devices. Our research combines electrical engineering, physics, and materials science and helps extend the limits of nanoscale engineering.


New Publication “Electron Emission Regimes of Planar Nano Vacuum Emitters”
Recent advancements in nanofabrication have enabled the creation of vacuum electronic devices with nanoscale free-space gaps. These nanoelectronic devices promise the benefits of cold-field emission and transport through free space,... Read more >>
Honorable Mention in Poster Contest for Dip Joti Paul
Dip Joti Paul won an Honorable Mention in the DLS student poster contest held at CLEO in San Jose from May 7-12 for his poster "Infrared Refractive Index Measurement of... Read more >>
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New Publication “PHz Electronic Device Design and Simulation for Waveguide-Integrated Carrier-Envelope Phase Detection”
Carrier-envelope phase (CEP) detection of ultrashort optical pulses and low-energy waveform field sampling have recently been demonstrated using direct time-domain methods that exploit optical-field photoemission from plasmonic nanoantennas. These devices... Read more >>
QNN Quarterly Newsletter
We’ve had a busy summer in the lab and in terms of sharing our results. Here are a number of published papers and key activities. Comings and Goings This summer... Read more >>
New Publication “Physical properties of amorphous molybdenum silicide films for single-photon detectors”
We systematically investigated the physical properties of amorphous MoxSi1−x films deposited by magnetron co-sputtering. The critical temperature Tc of MoxSi1−x films increases gradually with the Mo stoichiometry x, and the... Read more >>

The nanocryotron: A superconducting-nanowire three-terminal electrothermal device