Nonlinear absorption and optical limiting of fullerene complex C60[W(CO)3diphos] in toluene solutions and sol gel films

Wavelength-dependent optical limiting and nonlinearity in C-60[W(CO)(3)diphos] toluene solutions and sol gel films were studied from 532 to 700 nm. Significant improvement of optical limiting performance in C-60[W(CO)(3)diphos] compared to C-60 was achieved in the visible spectral range. Optical nonlinearity increases with the increment of wavelength. The results of optical limiting were analyzed using dynamical rate equations to obtain absorption cross sections for excited states. (C) 1999 Elsevier Science B.V. All rights reserved.