Soluble nickel bis(dithiolene) oligomers for third-order non-linear optical studies

Abstract

The synthesis and characterisation of two new nickel bis(dithiolene) oligomers is described. The third-order non-linear optical index of refraction (n₂) and real-to-imaginary ratio has been determined using the z-scan technique for one ditholene system as a guest in a poly(methylmethacrylate)(PMMA) host. A real-to-imaginary ratio (n₂/β) of 4.3 was determined at a concentration of 5 × 10²⁰ molecules cm^–3.