Abstract
Vanadyl-phthalocyanine (VOPc) thin films were prepared by molecular beam epitaxy (MBE) on polyethylenetelephthalate (PET) film. The morphologies and nonlinear optical properties of VOPc thin films were investigated with UV/Vis spectra, AFM images and the incident angle dependence of second harmonic (SH) and third harmonic (TH) intensities measured by Marker fringe. The UV/Vis spectra of samples 1 to 4 have an absorption peak at 830 nm. Therefore, the phase morphology of samples 1 to 4 is Phase II. The third optical susceptibility (χ (3) ) estimated from the maximum TH intensity is 7.5 × 10-8 esu. From the χ (3) value obtained, the VOPc thin film fabricated on PET substrate can be applied in optical devices such as optical switching so on.
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