NONLINEAR-OPTICAL EFFECTS ON DYE CONTAINING MOLECULAR-SIEVES

Composites of organic molecules and molecular sieves are promising mat erials for nonlinear optics. In order to achieve different NLO process es in these materials we varied the guest molecules. Paranitroaniline (PNA) and dimethylaminobenzonitrile (DMABN) were investigated in diffe rent molecular sieve hosts (AlPO-5, ZSM-5, VPI-5). These two groups of materials studied can be described by qualitatively different models: ensembles of oriented two-level or three-level systems. In contrast t o molecular sieves loaded with PNA which can only mix waves of the sam e polarization, for the DMABN based materials the mixing of waves of d ifferent polarizations is observed.