Silicon has been the material of choice for large-scale photovoltaics manufacturing due to cost and existing infrastructure and knowledge. Enhancements to…
Splitting water into molecular oxygen and molecular hydrogen is a compelling strategy for clean energy storage. In order to achieve…
Organic light-emitting diodes (OLEDs) and other optoelectronic applications employ molecular organic solids due to their high luminance, efficiency, and contrast…
Heteroepitaxy of polar and non-polar semiconductors has long been a challenge for integrating different semiconductor material systems. Previous research in…
We maintain a thin-film laboratory that includes a pulsed-laser deposition (PLD) system and an ultra-high vacuum sputter system. In PLD,…
High-energy radiation (e.g., γ-rays) is detected by wide-band-gap semiconductors operating under ambient conditions. When the detector intercepts a γ-ray, electron-hole…
Modeling etch-rate variation in Deep Reactive Ion Etching (DRIE) helps to identify possible defects in MEMS and IC devices arising…
Figure 1: Electron microscope image of the weak-link region in a MgB2 thin film lateral device. The proximity of the…
We are investigating the fabrication and magnetic properties of magnetic logic and memory devices. These consist of multilayer magnetoresistive ring-shaped…
Photovoltaics and sustainability have received a lot of attention lately. We seek a tandem photovoltaic device using silicon as both…
This work focuses on development of non-metallic substances that can catalyze carbon nanotube (CNT) growth while remaining in a non-metallic…
GaN-based devices, traditionally used for light-emitting diodes, are becoming very attractive for high-power, high-frequency applications for a variety of radar…
Gas sensors play a vital role in public health and safety, industrial process control, and reduction of toxic emissions into the environment. Conductometric gas sensors based on semiconducting metal oxide (SMO, e.g., ZnO, TiO2, and SnO2) thin films are of high interest in many applications due to high sensitivity, small size, and simplicity of measurement
Integration of the InP lattice constant with Si CMOS platforms is motivated by the monolithic interconnection of III/V optoelectronic and…
Silicon-on-lattice-engineered-substrates (SOLES), shown in Figure 1, were developed in our group as a substrate platform for integrating III-V devices with…
When thin films are heated to sufficiently high temperatures, they will usually dewet (or agglomerate) to form isolated islands. This…
Scanning helium-ion-beam lithography (HIBL) can fabricate patterns with sub-10-nm half-pitch. The interaction volume of a beam with a sample is…
A key challenge for putative industrial users of thermal nanoimprint lithography (NIL) is to design mask patterns that can be…