Prof. Godfrey Gumbs
1247 North Building
|Dr. Gumbs' area of research and scholarly activities have been dealing with the physics of low-dimensional electron and hole systems, The general thrust of his research work is concerned with developing an understanding of the quantum mechanical properties of the charge carriers in nanoscale semiconductor structures and devices. In particular, current work deals with the exchange and correlation effects on the optical and transport properties of nanostructures. These include Plasmon excitations and electron energy loss spectroscopy for multi-walled and single-walled nanotubes. The effects of magnetic fields and terahertz radiation on the collective excitations of nanotubes.
Other topics of his current research include:
1. The Rashba and Dresselhaus spin-orbit interaction (SOI) effects in quasi-2D and 1D structures including nanotubes. We are examing the role played by SOI on plasma excitations, the ground-state energy and diffusion.
3. The photoconductivity at low and intermediate frequencies for the 2D electron system is a subject which is actively being pursued. Plans for extending our technique to the high-frequency regime are being formulated.