Abstract
Nonlinear optical investigations on conjugated polymeric systems have shown strong nonlinear effects and fast response times (1). For application of these phenomena it is necessary to fabricate thin films with high uniformity of thickness, low optical scattering, photostability and low absorption in the near IR. Recently the conjugated polymer poly(p-phenylene vinylene) (PPV) was described (2–7). Third harmonic generation (THG) measurements at 1.85 µm (8) and femtosecond degenerate four wave mixing (DFWM) experiments at 580 and 602 nm (9) on PPV thin films demonstrated high optical nonlinearity and subpicosecond response time. Therefore PPV is an interesting system for further nonlinear optical investigations at other wavelength regions.
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