3RD-ORDER NONLINEAR-OPTICAL PROPERTIES OF PROCESSABLE POLYAZINE THIN-FILMS

The third-order nonlinear optical susceptibility chi(3)(-3omega;omega, omega,omega) of propylmethylpolyazine thin films as measured by the th ird harmonic generation is reported. The chi(3)(-3omega;omega,omega,om ega) values of propylmethylpolyazine that possess statistically altern ating methyl and propyl substituents on the carbon atoms along the con jugated chain were found to be 8.0X10(-12) esu off resonance at 1.5 mu m fundamental radiation. The interesting third-order nonlinear propert ies presumably originate from the unique periodicity of the main pi-el ectron-conjugated polyazine backbone.