Coupled Interface Plasmons of Al Films on CdSe and CdS

Abstract
Coupled plasmon modes have been observed at interfaces of thin (3-100-Å) Al films with CdSe and CdS by low-energy electron energy-loss spectroscopy. The spectral features and their dependence on film thickness demonstrate that chemically reacted layers form at the metal-semiconductor junctions with frequency-dependent dielectric constants which are significantly different from their semiconductor counterparts.