Organometallic complexes for nonlinear optics. 28. Dimensional evolution of quadratic and cubic optical nonlinearities in stilbenylethynylruthenium complexes

Quadratic nonlinearities for octopolar stilbenylruthenium complexes are large for compounds without strongly accepting substituents. Cubic nonlinearities \gamma\(800) and two-photon absorption cross-sections 92 increase on dimensional evolution from linear analogues to octopolar complexes, the latter possessing some of the largest \gamma\(800) and sigma(2) values for organometallics thus far, while cubic nonlinearities Im(chi((3)))/N from the first application of electroabsorption spectroscopy to organometallics are also large, scaling with the number of metal atoms.