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.
Electrical and Computer Engineering
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.
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.
My work can be broadly characterized as research towards vertically integrated design methodologies. These methodologies will enable digital system designers to identify opportunities for system optimization that require looking across the traditional system abstraction layers. This work includes collaborations with researchers working at multiple levels, levels ranging from high-level applications to low-level circuits and everything in between.
Terahertz (THz) vibrational spectroscopy is an emerging technique for characterization and fingerprinting of biological and organic materials. The new proposed approach for coupling between THz radiation and biomaterials allows for dramatic improvements in sensitivity, reliability, and selectivity of terahertz spectroscopic sensors with only nanograms of material required for sampling.
Silicon based electronics are expected to run out of steam shortly, and the search is on for a suitable replacement. There are many areas to look at when considering the future of electronics -- better architecture, better materials, better algorithms, better metrology, novel computational paradigms, bio-inspired computing etc. Our vision is to use theory, modeling, and predictive computational tools to provide a unified understanding that would guide strategic research in these disparate areas towards a common goal.
Boris Gelmont's present research area includes theoretical aspects of electronic materials and devices, theory of novel semiconductor devices (resonant tunneling diodes, quantum cascade lasers), modeling of devices (field effect transistors,Schottky diodes), transport and optical properties of semiconductors.
To develop optoelectronics for secure communications; security; imaging; alternative energy production; enviromental protection; and health care diagnosis, monitoring, and treatment