Research: Experimental Condensed Matter Physics We use ultraviolet to submillimeter electromagnetic radiation to probe the properties of condensed matter. Our facilities include laser-driven ultraviolet and visible spectrometers for Raman scattering and photoluminescence, with photomultiplier and optical multichannel detection; a far infrared Fourier spectrometer and submillimeter optically pumped laser, covering the range 20-1000 micrometers; a picosecond time-correlated single-photon counting spectrometer; access to the National Synchrotron Light Source at the Brookhaven National Laboratory, for high-power picosecond infrared measurements. These facilities are supported by appropriate electronic, data acquisition, and cryogenic equipment. We use the optical probes for fundamental and characterization work on materials, including most semiconductor microstructures of current interest, such as AlGaAs-and HgCdTe-based systems; a wide variety of superconductors, including high-Tc types such as YBaCuO, and granular systems like NbN; and molecular systems, including liquid water. We are also interested in detector physics, such as the characterization of high-Tc materials and their substrates for infrared use. The group also has strong computing capability. In addition to mainframe access, we operate some of the fastest and largest microcomputers on campus. These support sophisticated data analysis, and a new effort in simulating the optical properties for real materials. The combination of condensed matter and optical activity in my group gives an extremely flexible graduate education and produces expertise which is welcome in industrial as well as academic or government employment. There is generally a wide variety of projects available, with opportunities to focus on the laser and optical aspects. The group activities are consistently funded by outside sources, with research support for graduate students.