The research programs in Professor Campbell’s group, Photonic Devices, focus on photodetectors. At present he is actively involved in single-photon-counting APDs, Si-based optoelectronics, high-speed low-noise avalanche photodiodes, high-power high-linearity photodiodes, ultraviolet analanche photodiodes, and solar cells.
Ben Calhoun's research focuses on low-power VLSI design. Specifically, he is interested in ultra-low energy circuits operating in the sub-threshold region (with VDD less than VT). He also researches the impact of process scaling on memory circuits and architectures.
We are undertaking a new initiative to examine how DNA is released from the icosahedral capsid to initiate an infection. DNA release or uncoating is being studied beginning with purified DNA-containing capsids and an in vitro uncoating system recently developed in our laboratory. Experiments are carried out to identify the DNA end that emerges first from the capsid and to clarify the nature of heterogeneity observed in the population of DNA-containing capsids. In vitro studies are being complemented with an analysis of DNA uncoating as it occurs in infected cells.
Our laboratory is involved with developing magnetic resonance (MR) techniques as a tool for basic biomedical research. We have developed noninvasive, non-contrast-enhanced methods for imaging blood perfusion, demonstrated to be effective in imaging blood flow to the kidneys, lungs, heart, and brain in humans. We were also the first to demonstrate the feasibility of imaging the lung using hydrogen-based MR methods.
Professor Bart-Smith's research group is studying the mechanics of lightweight lattice truss structures for their use as load-bearing structures and impact amelioration systems as well as their possible morphing and thermal management capabilities. Secondly, Bart-Smith and her colleagues are using the principles of static determinacy and tensegrity--with their superior mechanical properties such as stiffness and strength--to develop a three-dimensional morphing foil with the propulsive and control capabilities of a manta ray.
Our research is focused on the application of surface and bulk micromachining to the development of new devices and circuits. We are currently working on the development of micromachined submillimeter-wave circuits for developing waveguide based receiver technology, RF-MEMS devices for cryogenic applications, and cavity based measurements of permittivity for fluids. Previous work includes the development of MEMS based microwave and millimeter-wave phase shifters and wideband switches, wideband monopulse processor circuits and recievers, and polarization agile recievers.
Ryan Comes (left), Engineering Physics graduate student from the Material Science and Engineering Department, explains the current research and gives John Holdren a tour of the lab