(Nicholas) Laszlo Frazer
Dept of Physics & Astronomy
Northwestern University
"More Excitons in Cuprous Oxide"
As part of the quest for more accessible sources of quantum coherence there have been numerous studies of exciton condensation in semiconductor heterostructures but condensation in bulk materials remains elusive. Cuprous oxide is a good candidate bulk material for exciton BEC because dipole decay is forbidden. The history of excitons in cuprous oxide will be reviewed.
Chunhan (Michael) Hseih
Electrical Engineering & Computer Science
Northwestern University
"Performance Enhanced Optoelectronic Devices using Transparent Conducting Oxide"
Transparent Conducting Oxide (TCO) material has vast potential applications due to its unique property of being both electrically conductive and optically transparent. It has already been successfully applied in flat panel display, light emitting diodes and solar cells for which the working wavelength is within the visible light range. For optical communication using infrared light at 1.3um and 1.55um wavelength, high absorption loss caused by traditional metal contact brings challenge in device design and limits the device performance. By using TCO as electrode contact, the challenge can be solved, making devices with very high performance possible. The commonly used TCO materials are introduced in the presentation. Also included are the material deposition with an emphasis on Ion Assisted Deposition (IAD) and material characterization. Methods used to extract the important electrical and optical parameters are explained.
Wednesday, January 20, 2010 at 12:00 PM
Room F235, Technological Institute
Refreshments are served at 11:30 PM
