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 “Demonstration of sub-3 ps temporal resolution with a superconducting nanowire single-photon detector”
Improvements in temporal resolution of single-photon detectors enable increased data rates and transmission distances for both classical and quantum optical communication systems, higher spatial resolution in laser ranging, and observation... Read more >>
New Grant “Nanostructured optical-field samplers for visible to near-infrared time-domain spectroscopy”
QNN awarded new SENSE.nano seed grant for the development of nanostructured optical-field samplers for visible to near-infrared time-domain spectroscopy. More information on this project and the other SENSE.nano awards may... Read more >>
New Publication “Single-Photon Single-Flux Coupled Detectors”
In this work, we present a novel device that is a combination of a superconducting nanowire single-photon detector and a superconducting multilevel memory. We show that these devices can be... Read more >>
New Publication “A general theoretical and experimental framework for nanoscale electromagnetism”
The macroscopic electromagnetic boundary conditions, which have been established for over a century, are essential for the understanding of photonics at macroscopic length scales. Even state-of-the-art nanoplasmonic studies, exemplars of... Read more >>
Andrew Dane awarded Best Poster at the 706th W.E. Heraeus Seminar
Congratulations to Andrew Dane, who won the best poster award at the 706th W.E. Heraeus Seminar, titled Superconducting Kinetic Inductances for his work on high-Q superconducting niobium resonators incorporating nanoscale... Read more >>

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