CYLINDRICAL SURFACE AND INTERFACE PLASMONS

An expression for the surface-plasmon dispersion, using the hydrodynam ical model for a cylindrical bounded electron gas, has been derived, w hich agrees with the theoretical and experimental work of other worker s. The volume-plasmon dispersion relations have also been obtained whi ch are found to have strong resemblance with that of Bohm and Pines di spersion relation. It is shown that the critical wave vector for excit ing the plasmon oscillations is different for the hydrodynamic flow in the cylindrical boundary. The interface surface plasmons have also be en discussed for the hydrodynamic cylindrical flow.