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.
The nanocryotron: A superconducting-nanowire three-terminal electrothermal device
Recent QNN News
New Publication: Photolithography-compatible three-terminal superconducting switch for driving CMOS loads
A new paper written by the group was recently published in Physical Review Applied. Dip Joti Paul, Tony X. Zhou, Karl K. Berggren, “Photolithography-compatible three-terminal superconducting switch for driving CMOS loads,” Physical Review Applied, 24, 2, p. 024060,...
Community Outreach Event: Appalachian Optics Outreach Event 2025
On July 14th, QNN group co-leader Dr. P. “Donnie” Keathley led a successful hands-on optics workshop for middle and high school teachers in Eastern Kentucky. This is hopefully the first of many outreach workshops in the coming years. With coordination from the local...
New Publication: Determination of mid-infrared refractive indices of superconducting thin films using Fourier transform infrared spectroscopy
A new publication written by the group on was recently published in Applied Physics Letters. Dip Joti Paul, Tony X. Zhou, and Karl K. Berggren, “Determination of mid-infrared refractive indices of superconducting thin films using Fourier transform infrared...
Joey Alongi, Reed Foster, and DJ Paul awarded fellowships
Congratulations to Joey Alongi on receiving a fellowship from the NSF Graduate Research Fellowship Program (GRFP), to Reed Foster on receiving the MIT Claude E. Shannon Award, and to DJ Paul on receiving the Mathworks Fellowship!! Joey's proposal for the NSF GRFP...
QNN Summer 2025 Newsletter
Dear QNN Group Members, Alums and Affiliates, Happy summer everyone! We have had lots of news and comings and goings. First of all, Karl has now been in his role as EE Faculty Head for a few months and is getting used to it, finding more time to interact with the...