Gregory Group Research


Stephen Gregory’s research area involves both optical and solid state physics.  One ongoing project involves fundamental studies of surface plasmon optics, which has been proposed as a technology for microscopic optical circuitry.  We are developing new techniques for observing the propagation and scattering of surface plasmons and their interconversion with free-space photons.  In particular we are interested in localization and non-linear effects on strongly scattering surfaces.  

Another project investigates the electronic properties of a metal surface under intense illumination, using a flattened tunneling microscope tip as the surface of interest and a refractory film as a counterelectrode.  Pulsed laser light causes time-resolved charge motion in the surface layer, which we detect capacitatively.