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Optical nonlinearities of poly(p-phenylene vinylene) (PPV) thin film waveguide

The nonlinear-optical properties of poly (p-phenylene- vinylene) (PPV) were studied. The sign and size of the real and imaginary part of (chi) (3) have been measured at 532 nm to be -5.168 multiplied by 10-9 esu and -1.952 multiplied by 10-9 esu, respectively by the Z-scan method. The nonlinear refractive index n2 is of -4.271 multiplied by 10-9 esu, and all-optical switching in the PPV thin-film waveguide was observed by prism coupling.