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 “Nanoantenna design for enhanced carrier–envelope-phase sensitivity”
Optical-field emission from nanostructured solids such as subwavelength nanoantennas can be leveraged to create sub-femtosecond, petahertz-scale electronics for optical-field detection. One application of particular interest is the detection of an... Read more >>
Marco Colangelo awarded IEEE CSC fellowship
Congratulations to Marco Colangelo on receiving the IEEE CSC Graduate Study Fellowship in Applied Superconductivity.
New Publication “Electrostatic electron mirror in SEM for simultaneous imaging of top and bottom surfaces of a sample”
The use of electron mirrors in aberration correction and surface-sensitive microscopy techniques such as low-energy electron microscopy has been established. However, in this work, by implementing an easy to construct,... Read more >>
New Publication “Nanoscale refractory doped titanium nitride field emitters”
Refractory materials exhibit high damage tolerance, which is attractive for the creation of nanoscale field-emission electronics and optoelectronics applications that require operation at high peak current densities and optical intensities.... Read more >>
New Publication “On-chip sampling of optical fields with attosecond resolution”
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... Read more >>

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