Abstract
Reversible controllability of the third-order nonlinear optical activity has been demonstrated on a one-dimensional metal complex. Iodine penetration to a film sample causes disappearance of the d-p transition absorption band of the metal complex and remarkable decline of two-odd orders in the third-order nonlinear susceptibility. The deactivated optical nonlinearity was completely restored by removing iodine from the film with heating. The observed alterations in optical nonlinearities are mainly caused by the fluctuation of metal-metal interaction in the linear metal chain.
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