Manjunatha, K.B.Rajarao, R.Umesh, G.Badekai Ramachandra, B.R.Poornesh, P.2026-02-052017Laser Physics, 2017, 27, 8, pp. -1054660Xhttps://doi.org/10.1088/1555-6611/aa7370https://idr.nitk.ac.in/handle/123456789/25555A salen-based ruthenium (Ru) (II) complex was synthesized for possible use in nonlinear optical device applications. The Ru complex was doped in a polymer matrix to fabricate films using a low-cost spin-coating technique. The third-order nonlinear optical parameters of the complex were investigated by Z-scan and degenerate four-wave mixing techniques. The study reveals two-order enhancement of third-order optical susceptibility ? (3) and exhibits superior limiting capability due to a reverse saturable absorption process. All-optical switching action for the films indicates that the sample can function as an optical inverter or a NOT gate. Hence, the Ru (II) Schiff-base complex materializes as a possible candidate for use in nonlinear optical devices. © 2017 Astro Ltd.Four wave mixingOptical devicesOptical switchesPolymer filmsRuthenium compoundsAll-optical switchingDFWMOptical power limitingRu complexesZ-scanNonlinear optics