Research Interests

My major research area has been in the microscopic origin of physical phenomena in condensed-matter systems with emphasis on collective behaviors underlying magnetic, optical, electronic, acoustic, and structural properties of materials. These include the linear and nonlinear responses of materials to external drivers such as stress, electric, magnetic, and optical fields. With others, I have done considerable experimental research on the dynamical aspects of phase transformations that result in long-range order such as ferroelectricity, magnetism, and superconductivity. We have used laser spectroscopy and nonlinear optics to probe materials ranging in complexity from molecular hydrogen and rare gases through liquids, metals, dielectrics, and semiconductors to the multi-component cuprate superconductors and related materials. Much of this research has required advancing the state of the experimental art in optical spectroscopy, particularly in the directions of high-contrast, high-resolution, and multichannel detection.

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Primary Section

Section 33: Applied Physical Sciences