• Theoretical Condensed-Matter Physics
• Theoretical Elementary Particle Physics
• Astrophysics and General Relativity
• Experimental Elementary Particle Physics
• Accelerator Physics
• Experimental Condensed-Matter Physics
• Biological Physics
• Multidisciplinary Research
• Major Research Facilities
• Resources for Researchers

Recent Publications

B.S., 1958, Physics, University of California at Berkeley. Ph.D., 1962, University of California at Berkeley. Research Associate, Physics, Cornell University, 1962-64. Assistant professor, Physics, Cornell, 1964 -67. Associate Professor, Physics, Cornell University, 1967-71. Professor, Physics, Cornell University, 1971-91. E. L. Nichols Professor of Physics, Cornell University, 1991-present. Director of the Laboratory of Atomic and Solid State Physics, Cornell University, 1995, 1997- 2006. Member, Cornell Center for Materials Research; Member, Center for Radiophysics and Space Research, Cornell University. Visiting appointments at: Stanford University; University of California, Irvine; University of Canterbury, New Zealand; Los Alamos National Laboratory; IBM Research Laboratory, San Jose; Science University of Tokyo; Max Planck Institute, Stuttgart, Germany; Seoul National University; Tohoku University, Japan; and Arizona State University, AZ. NSF Senior Fellow, 1971; New Zealand Erskine Fellow, 1976; Humboldt Senior Scientist, 1985. Fellow, American Physical Society; Fellow, Optical Society of America. APS Frank Isakson Prize, 1988; Institute of Physics (London) Kenneth John Button Prize, 1999.

Research Areas
Laser and spectroscopic techniques used to probe the linear and nonlinear dynamics of the low lying excitations in homogeneous and heterogeneous media; the dynamical properties of intrinsic localized modes: in micromechanical arrays, in anharmonic crystals and in magnetic solids

Current Research

The exploration of energy localization in discrete lattices, both classical and quantum mechanical, is an ongoing focus. Inelastic neutron scattering is used to study intrinsic localized mode in crystals. Holographic Fourier transform spectrometer is being developed for electron bunch length measurements of the ERL prototype.

Collaborators in this research: Nick Agladze, Mike Manley, John Page, Masayuki Sato, Gwyn Williams and Jonathan Wrubel

Spotlight

Jalina Keeling is an undergraduate student with the Itai Cohen Group on Complex Matter Physics (who is at Cornell as part of the NSF's Research Experiences for Undergraduates program). She is conducting experiments similar to the epitaxial growth of crystals, but using polymer beads. She uses a confocal microscope to scan a sample of these beads from bottom to top. Her research seeks to answer the questions "What structures form? How do we tune the concentration of polymers to change ...
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