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Measurements of mechanical stress and strain at the 10 nm to 100 nm length scale by nano-optical techniques such as tip-enhanced Raman spectroscopy; optical and mechanical properties of semiconductor nanowires and related low-dimensional nanostructures in the SiGe, AlGaInN, and ZnO materials systems; optical characterization of defects and impurities in semiconductor nanostructures; applications of optoelectronic materials in sustainable technologies for energy generation and efficiency, including solid-state lighting and photovoltaics
American Physical Society
Materials Research Society
Photovoltaics technical area coordinator
Contributor to AlGaAs compound semiconductor composition standard (SRM 2841)
Materials Reliability Division
Nanoscale Reliability Group
2007 to present: Physicist, Materials Reliability Division, NIST, Boulder, CO
1987 to 2007: Physicist, Ceramics Division, NIST, Gaithersburg, MD
Ph.D., Physics, Massachusetts Institute of Technology, 1986
B.S., Physics, Massachusetts Institute of Technology, 1979