Low Optical Limiting and Nonlinear Optical Properties of Vanadyl Phthalocyanine using a CW Laser

Vanadyl phthalocyanine complex has been prepared and characterized by FT- IR, Differential Scanning Calorimetry (DSC) and elemental analysis. The third-order nonlinear optical and optical limiting properties for solution of vanadyl phthalocyanine have been investigated using a continuous wave laser at 635 nm. We have employed the Z-scan technique to evaluate the sign and magnitude of nonlinear refractive index and nonlinear absorption coefficient. The concentration dependent nonlinear refractive index was observed in this medium. We have observed low power optical limiting action, with low limiting thresholds, based on nonlinear refraction in the medium. It indicates that the vanadyl phthalocyanines could be promising candidates for optical limiting materials