Metal Cluster's Effect on the Optical Properties of Cesium Bromide Thin   Films
  Cesium Bromide films grown of glass substrates by thermal evaporation showed interesting optical properties. The UV-visible absorption spectra showed peaks which showed red shift with time. Structural and morphological studies suggested decrease in grain size with time which was unusual. Theoretical simulation shows the optical behaviour to be due to surface plasmon resonance resulting from Cesium clyindrical rods embedded in the films. 
Kuldeep Kumar, P. Arun, Chhaya Ravi Kant and Bala Krishna Juluri
cond-mat.mtrl-sci