John Ketterson Fayerweather Professor PhD, University of Chicago, 1962 Fellow, American Physical Society Fellow, American Association for the Advancement of Science John Ketterson's research interests cover many areas of condensed-matter physics, including liquid 3He and 4He; artificial superlattices; heavy-fermion, conventional, and high-Tc superconductors; Langmuir-Blodgett and other organic films; scanning-electron, near-field optical, tunneling, and atomic-force microscopy; novel thermoelectric materials; nanostructured magnetic, optical, metallic, and semiconducting materials; nonlinear optical and excitonic materials; and Josephson-junction devices. His current research programs include studying collective-mode phenomena in 3He; microwave absorption measurements in Zn, UPt3and UBe13 up to 40 GHz (to search for collective modes); developing a cryogenic scanning-tunneling microscope (STM) and constructing a new STM probe based on his temperature-compensated wide-amplitude design; developing the SPOM (surface plasmon optical microscope) to study biological membranes; and performing atomic-force microscope studies (with R. C. MacDonald of Northwestern's biochemistry, molecular biology, and cell biology department) on the red-blood-cell cytoskeleton.  Ketterson is also researching the development of AlN, KTP, and SiC film deposition and wave-guide patterning to make a Mach-Zhender optical switch; continuing development of multilayer superconducting X-ray detectors and other devices; working to clarify the interaction observed between multilayer junctions and microwaves; fabricating dot-matrix arrays of superconducting, ferromagnetic, and normal metals with electron-beam lithography; and developing surface-plasmon-based optical biosensors. Magnetic and Physical Properties Measurement Facility Selected Publications K. Rivkin and J. B. Ketterson Magnetization Reversal in the Anisotropy-Dominated Regime Using Time-Dependent Magnetic Fields Applied Physics Letters 89, 252507 (2006) J. I. Jang, Y. Sun, B. Watkins, et al. Bound Excitons in Cu2O:  Efficient Internal Free Exciton Detector Physical Review B74, 235204 (2006) S. E. Shafranjuk and J. B. Ketterson Josephson Plasmon versus Amplitude Modes in a Superconducting Tunnel Junction Physical Review B74, 172501 (2006) J. J. Lee, M. Y. Kim, Y. Cui, et al. Room Temperature Ferromagnetism of Ge/MnAs Digital Alloys Journal of Superconductivity 18, 75 (2005) Z. G. Yin, H. T. Zhang, D. M. Goodner, et al. Two-Dimensional Growth of Continuous Cu2O Thin Films by Magnetron Sputtering Applied Physics Letters 86, 061901 (2005)