John Ketterson, Fayerweather Professor
Department of Physics and Astronomy
Northwestern University

E-mail: j-ketterson@northwestern.edu
Phone: 847-491-5468

PhD, University of Chicago, 1962
Fellow, American Physical Society

Research Areas
This research focuses primarily on the optical and magnetic properties of two-dimensional patterned lattices of dots or holes (in an otherwise continuous film). The optical properties currently involve second harmonic generation in ZnO and AlN based materials and plasmon resonant properties of arrays of Ag nanoparticles. The magnetic studies involve static (SQUID) magnetization and ferromagnetic resonance measurements in dot and hole arrays of permalloy and Ni. In some cases the effect of nanomagnetic arrays on an overlying superconducting film are studied where the dots act as vortex pinning centers. Such a sample is shown at right where the edge of a superconducting Nb film extends through a patterned Nidot array.

Related Publications
Excitonic gain and stimulated ultraviolet emission in nanocrystalline zinc-oxide powder, Y. Sun, J. B. Ketterson, and G.K.L. Wong, Appl. Phys. Letters, 77, 2322 (2000).

Periodic magnetization instabilities in a superconducting Nb film with a square lattice of Ni dots, A. Terentiev, D. B. Watkins, L. E. De Long, D. E. Morgan, and J. B. Ketterson, Phys. Rev. B61, R9249 (2000).

Photoluminesence and Ultraviolet Lasing of Polycrystalline ZnO Thin Films Prepared by the Oxidization of Metallic Zn, S. Cho, J. Ma, Y. Kim, Yi Sun, G. K. Wong, and J. B. Ketterson, Appld. Phys. Letters, 75, 2761, (1999).

A Numerical Study of Optical Second Harmonic Generation in a Photonic Structure, G. T. Kiehne, A. E. Kryukov, and J. B. Ketterson, Appld. Phys. Letters, 75, 1676 (1999).

Optical Second-Harmonic Generation in Sputter-Deposited AlN Films, G. T. Kiehne, G. K. L. Wong, and J. B. Ketterson, J. Appld. Phys. 84: (11) 5922-5927 (1998).