David G. Stroud

Department of Physics

2048 Physics Research Building

191 W. Woodruff Avenue

614-292-8140

Contact Professor Stroud

Research web page for Professor Stroud

Stroud and his group carry out theoretical investigations of the optical, infrared, and magnetic properties of multicomponent hybrid materials which are structured at the sub-micron and nanoscale. They iare presently modeling extraordinary transmission of light through metallic screens made of Ni, Au, and Ag, and containing a periodic array of holes. One goal of this work, carried out in close collaboration with J. V. Coe in Chemistry, is to see how this transmission is affected by Raman-active molecules in the holes. They are also studying the optical properties and structure of 5-20 nm gold particles to which strands of DNA are connected; the absorption of these systems dramatically changes when the DNA causes the particles to agglomerate. Another problem under study is the absorption of gold nanoparticles when they are coated by nematic liquid crystal. Stroud and his group are also modeling propagation of plasmon waves through chains and two-dimensional arrays of gold and silver nanoparticles. In the area of magnetics, Stroud is developing models for magneoresistance and Hall coefficient for materials which have nanoscale inhomogeneities. They are also modeling Faraday rotation by small magnetic particles and other inhomogeneous magnetic materials. Finally, they are studying magnetic properties of nanoscale wires, including motion of domain walls driven by spin currents.