PHOTONIC SYSTEMS

Inteferometric Imaging
D. Brady,Principal Investigator R. Stack, E. Michielssen
Packard Foundation; Beckman Institute for Advanced Science and Technology; U.S. Air Force Office of Scientific Research, F49620-95-1-0496

This project examines the information capacity of interferometric imaging systems for applications to 3-D sensing and superresolved imaging. The capture of space-time fields by scanning imaging interferometers and by diffractive interferometers are central to experiments under this program.

Ultrafast Surface Science

D. Brady,Principal Investigator J. Lyding, M. Gruebele (Chemistry), N. Makri (Chemistry)
National Science Foundation, DMR 96-12194

The ultrafast surface science laboratory consists of a vacuum STM chamber coupled to a variety of mode-locked and continuous wave optical sources. In the laboratory studies are made of molecular and atomic dynamics on surfaces, photo-assisted electron disorption, dynamic charge waves, and the ultrafast dynamics of STM tip-surface coupling.

Distributed Bragg Pulse Shapers and Ultrafast Communications

D. Brady,Principal Investigator K. Purchase, D. Roh, J. Coleman
U.S. Air Force Office of Scientific Research, F49620-96-1-0163

Electrooptic modulation of parallel Bragg gratings in AlGaAs waveguides is used to create terahertz bandwidth wavepacket encoders for optical communications. This project focuses on the design of wavepacket encoders and of critical spectral holographic elements for terahertz communications systems.