Nonlinear Optical Properties Of Metal Cluster

Clusters are stable aggregates of a few or thousands of atoms, molecules or ions bound together by chemical or physical force. Their special microstructure and peculiar physical and chemical properties cast light on a new way leading to fabricating special materials. As a new kind of photoelectronical material, clusters have attracted much attention of a great number of researchers. The research on the optical nonlinearity and optical limiting properties of clusters flourishes all over the world.We studied the nonlinear optical properties of novel clusters of pentanuclear planar open structure using the excited-state Z scan theory. Parameters Ka and Kr are introduced respectively. The experimental results are analyzed by using excited-state theory. The optical limiting properties of the materials are investigated by using nanosecond laser pulses. We find that skeleton atoms and terminal ligands with larger atomic number can improve the optical limiting power of clusters with the same structure via heavy-atom effect. The study shows that big optical limiting is mainly arised from excited-absorption. Optical physical parameters and optical limiting are obtained .The study increased our knowledge about optical limiting and optical nonlinear properties of meal clusters.