Our main research interest is the study and development of nano-scale electronic and optoelectronic materials and devices. Our research activities are focused on the following areas:
Theory, Modeling and Simulation (TMS)

•Our interest in TMS include more physics-oriented investigation of fundamental interaction between light and semiconductor nanostructures and more engineering oriented modeling and simulation for device design and development of novel optoelectronic and nanophotonic devices. The former deals with more general theoretical aspects of many-body effects in nanostructures, exciton-plasmon couplings, intersubband transition physics, and light-matter interaction and laser theory in metal-semiconductor structures, while the latter deals with comprehensive device modeling and simulation with the goals of understanding device performance and designing novel device or device functionalities.

•We have been conducting research in various nanowires since 2003 when the PI was still at NASA. Currently we study the growth of nanowires of III-V, II-VI, IV-VI, and other metal-oxide semiconductors, including also some novel materials such as a new erbium compound, called erbium chloride silicate. We perform extensive material characterization of these nanowires such as SEM,TEM, XRD, XPS, Raman etc. Our mostly extensive effort is on optical characterization of such wires to study physics, and device potential of such nanomaterials. Our goal in this area is to fabricate nanowire-based photonic devices for lasing, detection, sensing, and solar cell applications. One of the foci is study of doping and contacts for electrical injection/extraction devices.
Semiconductor Nanophotonics
• This one is somehow related to the nanowire efforts. But the goal here is to study the ultimate size and performance limit of nanophotonic devices such as lasers, detectors, and waveguides. One important new ingredient is the integration of metallic nanostructures with active semiconductor nanostructures. Such integrated devices/systems could eventually (if not already) find applications in areas such as integrated photonic chips for information processing and optoelectronic computing, bio-chemical sensing, spectrometer on-a-chip etc.